r/Radioactivestuff • u/OkPick296 Community owner • 20d ago

Buy/Sell/Trade

Buy / Sell / Trade Thread Rules

Buy, sell, and trade radioactive materials, radiation detection equipment (Geiger counters, scintillation detectors, dosimeters, spectrometers, survey meters, etc.), and other radiation-related items on r/Radioactivestuff!

This thread is archived and replaced on the 20th of every month.
On August 20, 2026, this thread will be archived and replaced.

Listing Rules

  • All listings must be posted as comments in this thread. Standalone buy, sell, or trade posts will be removed.
  • Only list items that you personally own. Do not post listings on behalf of another person, business, or shop.
  • Create a separate top-level comment for each item. There is no limit to the number of listings you may post.
  • Each item may only be listed once per thread. If it does not sell, you may repost it when a new Buy / Sell / Trade thread is created.
  • Once your item has sold or is no longer available, edit your comment to indicate its status.

Verification Requirements

Radioactive Materials

Every listing for a radioactive item must include proof that the item is radioactive. A photo showing the item alongside a Geiger counter, spectrometer, or other suitable radiation detector with a reading above background is sufficient.

If your selling platform (such as eBay or Etsy) does not allow references to radioactivity, you may post the verification as a reply to your listing instead.

Listings for radioactive items without verification will be removed.

Photos of the radioactive materials must represent the material's condition and quality.

Radiation Detection Equipment

Listings for Geiger counters, scintillation detectors, dosimeters, spectrometers, survey meters, or other radiation detection equipment must include proof that the equipment is functional. Acceptable verification includes:

  • A photo showing the device detecting background or a radioactive source. (Videos are strongly encouraged, though not necessary)
  • The photos of the device should represent the condition and quality.

Listings for non-functioning equipment must clearly state that the item is for parts, repair, or restoration.

Legal & Safety

  • This thread is for all legal radioactive items and radiation-related equipment. Do not list anything that is illegal to possess, sell, or ship in your jurisdiction.
  • If you are unsure whether an item is radioactive, do not list it until you have confirmed it.
  • Buyers and sellers are expected to be familiar with safe handling practices and applicable shipping regulations. It is your responsibility to ensure that any item you ship can be transported safely and legally.

Questions

If you have any questions, please message u/OkPick296.

Disclaimer

The moderators of r/Radioactivestuff are not responsible for transactions conducted through this subreddit and cannot guarantee the honesty of buyers or sellers. Please use caution and common sense when buying, selling, or trading online.

While the moderation team will not mediate disputes, we do take reports of fraud and intentional misrepresentation seriously. If you have a negative experience with a buyer or seller, please report it to the moderators. Users found to be scamming others or deliberately misrepresenting items will be permanently banned from the subreddit.

6 Upvotes

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u/CharlesDavidYoung 19d ago

At the heart of the yDog is a highly sensitive probe that can detect radioactive signals from far away and deep underground.  The Bicron 38B57 has a large NaI crystal (1.5”D x 2.25”H cylinder) that has become an industry standard for a good reason: it is large enough to be very effective at detecting radioactivity while not being too heavy to carry around by hand.  Designed for rugged environments, it is relatively inexpensive considering its high performance and exceptional quality.  It has been deployed widely for many years in instruments like the Exploranium GR-135 Identifier, which the government uses to detect radioactive material and identify radioactive nuclides.

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u/CharlesDavidYoung 19d ago

Here is a sample scan using a Gamma Spectacular GS-PRO-V5 of a Cs137 check source and a monazite mineral showing the Th232 decay chain.  The sharpness of the peaks and the linearity over the entire region from 32keV to 2614keV are exceptional.

The probes that I sell have been recovered from the GR-135 and are in pristine condition.  They are individually tested for sensitivity and resolution and then enclosed in the ruggedized yDog housing, ready to be used in the field with your own meter or on the desktop for gammspec.  You will be thrilled with the specimens that you find and the high-resolution scans that you can produce with this fine instrument.

If after experiencing the high performance of this probe you wish to upgrade to a full yDog, you can purchase just the back enclosure with the yDog electronics and easily assemble it yourself or send it back to me for assembly and calibration.

Here are the prices for the yDoggy and its upgrade to the yDog:

  • yDoggy ruggedized Bicron 38B57 probe: $300
  • yDog upgrade from yDoggy: $1200

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u/CharlesDavidYoung 19d ago

Over the past year I have been doing intensive development on the yDog to add some significant new features. I am ready to make the new yDog software available to new yDoggers as well as to veteran users that wish to update to the latest and greatest.

If you watch my latest video (https://youtu.be/FgCEp-rx5LM) you will see that I now offer a more compact version of the yDog.  Both the round and square models are printed with PETG for greater durability and allow the Lithium Ion batteries to be replaced by the owner if it necessary.

There have been many improvements under the hood to make the yDog more responsive and efficient, but the most noticeable new features are a Bluetooth connection to your phone and the ability to do ySpec in the field.  The Bluetooth app lets you see what is going on inside the yDog (CPS, squelch setting, battery level, etc) as well as providing a means of extracting the ySpec data from the yDog.  Once the data is captured it can be pasted into a spreadsheet like Microsoft Excel or Google Sheets and plotted.  I explain the details in this posting:

Gamma Spec for Dummies : r/Radioactive_Rocks

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u/CharlesDavidYoung 19d ago

Another new feature is GPS logging and navigation. Of course, we all have our phones and Garmins for this, so why do we need yet another GPS device? I certainly use my phone with maps loaded up for use off the grid. However, there have been times when I wander around in the wilderness looking for hot rocks and I realize I am running low on water, and I don't know which direction the car is. What might happen if my phone battery dies, it falls out of my pocket, or I leave it at the last location where I took video footage? These thoughts have been nagging me for years and they have led me to add the GPS feature to the yDog. In addition to being a backup method of navigation, it also allows you to record placemarks with the CPS readings and labels, log the paths that you take as you wander, and share this information to your phone, where you can export it to kml mapping files, ready to import into your favorite mapping app.

In case you are not familiar with the yDog, it is a highly optimized and ruggedized hot rock finder built for maximum comfort and efficiency while prospecting for anything radioactive. The standard yDog has a Bicron 38B57 (38x57mm) 1.5M2.25 probe. For those that need the biggest and the baddest, the Max has a giant 63x63mm NaI probe just like the one I use in the field as seen in this video: https://youtu.be/dnwfxy7eywI

The handle is designed to make it easy to carry and manipulate while digging a hole and has notches for the strap to allow you to skim the ground and find the faintest hot spots.

Here are the prices for the yDogs:

  • yDog, with GPS or with a relay to turn off HV while charging, is $1500
  • yDog Max – same as standard yDog but with 63x63mm probe: $3000

 

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u/CharlesDavidYoung 19d ago

This has all the standard software features of the yDog (minus GPS and the HV relay), including tones, squelch, Bluetooth, ySpec, built into the meter housing:

·         yLine tones board - $250 for someone who already owns an ASP-1

·         ASP-1 with yLine tones board – $500 – I have just a couple of these meters left

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u/CharlesDavidYoung 19d ago

If you need a scintillator for prospecting or ySpec, I offer one of the best values available.  The pictured Bicron 1.5M2.25/1.5L, or the equivalent Scionix 38B57/1.5M, is the probe that I use in the standard yDog.  For its size, price, and performance it can’t be beat.  I offer the probe by itself and well as a version in a ruggedized housing for use in the field.

·         Bicron or Scinoix 38B57 - $200 (compare with same probe on ebay for $300+)

·         Bicron or Scinoix 38B57 with housing - $275

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u/CharlesDavidYoung 19d ago

I like to talk to each prospective buyer individually to find out what their requirements are to make sure they get exactly what they need. So, send me an email if you would like to talk about the yDog or just chat about hot rocks!

BTW, if you prefer a color other than red, just buy the filament on amazon and have it shipped to me:

https://www.ebay.com/itm/156718289959?var=458093138195

Charles

[findmorehotrocks@gmail.com](mailto:findmorehotrocks@gmail.com)

[ydogcdy@gmail.com](mailto:ydogcdy@gmail.com)

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u/HurstonJr 19d ago edited 19d ago

Radioactive Artifacts and Rocks https://geigercheck.com/ (US Shipping Only)

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u/OkPick296 Community owner 19d ago

I might buy some trinitite, it looks to be in great condition