[cctalk] Old Silicon Valley poster

I'm cleaning out my warehouse bit by bit, and started selling posters on the eBay. I have two of these: https://www.ebay.com/itm/334649989332 I sold one of these posters last week for $95+20 s/h. I listed the second one and the buyer of the first one submitted an offer for $300 and then for $500. Then a second guy offered $350. I declined all three, then did the rotten move of jacking the price to $350 because no one had yet bid, and now the second guy has bid $350. Not to humble brag, but what do I have here? I probably got them for free at a trade show. - John