Sounds like someone bought a forgery collections long time ago and did nothing with it . Now years later having no interest in research or spending time learning about them , plans to sell them but hope against hope thinking the previous owner made a few mistakes and hopeing some are real . That is why those are posted on a chat board .
Not the kind of situation I want to help out . Forgeries like the many shown here are regularlity sold at stamps auctions for $800.00 for 1200 different ,all common forgeries . People buy these lots and try to sell them on
ebay as forgeries at $3.00 to $5.00 each .Then others think they can sell them as real stamps with huge price tags .