row 2 column 2 seems to be a eid mar, they all have a real weird and common corrosion, some look genuin wonder what he did to them
LOL, you're right! The seller is trying to sucker someone into thinking there's an authentic EID MAR in the bunch. Worthy of the effort of cropping and posting for posterity
Artificial climate and weather acceleration chamber to test anticorrossive materials (such as stainless steel), in an accelerated weather test. Test is common for manufactured consumer products that are used outdoors. I feel any coin can be used in those testing chambers to emulate a "hoard find". These chambers are used within a short period (under a day), to test how materials hold up in theoretical 1 year, 2 year, etc. outdoor weather conditions. Want to see how your deck chair would look like being outdoors in 3 years? Put it in the chamber for a day...
Is everyone aware of toolhaus.org? You can submit an eBay seller's name and get a list of all negative and neutral feedback. 96% positive feedback seems like a good rating but is actually a huge red flag for an eBay seller.
