I collect German D&D/Ad&D 1st products.
Those modules are quite common on Ebay, recently many of them were sold, generally in classic auctions, sometimes BIN. Prices never ended high, from 5 to 15 euros in general, even in
SW, mint or near mint condition.
Last Expert and Basic modules in the series are more expensive and less common in this condition, like E6, E7, B6, B7, B8, prices can go up to 20-25 euros.
I like the German versions from FSV : a lot of modules were translated, and the cover design is very similar to the american orginal.
So AS1 AS3 AS4 and M1 are easy to get on Ebay for a fair price and in excellent to mint condition. If your aim is to sold some of them, you will not get a lot of money for them.
