I'm going to post here once, drop a hot-take, and likely leave, never to return. I also only read the first post and no others, so if I'm beating a dead horse....
Ebay, is not your friend. The sellers are not there to give you a hand-job after a hard day's work. People sell on ebay to make MONEY. To expect sellers to be your friend is asinine (and vise-versa). If you want a different experience, I suggest a different website entirely. If I can get an extra $20 for a special revision for a SS7 board. I WILL. Not because i'm greedy or i'm trying to pull one over on you. But because there is a 99.999% chance I'm selling something to buy something else, and the less 'new' money I put into this hobby, the better I feel.
just because someone puts their wellbeing over yours, does not make them an asshole. THAT SAID... I can empathize with your frustration with the price change. But I'd ask the following. If it WASNT the revision you are looking for, would you have expected a cheaper price? Would that not have been "asshole behavior" to the seller?
*smokebomb*
Once men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them. - Reverend Mother Gaius Helen Mohiam