Just Got Scammed

Hello everyone..... im a 56 year old Lego enthusiast that just recently got into Lego. Im especially fond of the 1:8 scale supercars... The McLaren was my 1st. Working on the Ferrari SP3 right now. Just received the Lambo (via eBay) and the Bugatti (also eBay) lands next week. Never really eyeballed the Porsche as i only have seen it for about $1000... When i saw it on ebay for $300 i jumped for it. Too quickly. Bought it from someone with no previous history. What makes it worse is that...