A magnificent collection. Most stamps are in excellent condition. If they are marked by a * they are either hinged or have a small fault, such as toning, however. I expect that most stamps are correctly categorised, though the previous owner may have made an occasional mistake. Stamps marked "gepruft" are usually certified by Kramp BPP, though some may just have the variety stamped on the back. 

EU Bidders please note: IOSS rules state that lots under 150 Euros should not be charged customs or import duty if VAT is paid. Two countries, namely Italy and Austria, however, routinely ignore this rule, and I have just had a case in France. Other EU countries have been ok thus far.
This is a very sad situation, but please take the possibility that you may be charged import duty into account when bidding. I am not liable to pay import/customs duty. I believe the 150 Euro rule will be changing in 2025. I hope the situation doesn't become even worse!