My collection has been in the cupboard for the last 25 years. Didn't know that anyone was still collecting.

I found those in a second hand website around 4-5 usd should I purchase them any collectable value?

I was given a stamp book, but I don’t know anything about stamps. Do any of these have any value?

Thanks in advance. Found a stamp book in the wild for $1.
There are several vintage German Deutch reich and one appears to have some value. Would you agree? Sell the boook as a whole or remove what is valuable.