Someone sold complete collections of EVERY GAME for 22 different consoles for $1.2 mil on eBay. Everything Nintendo through the Gamecube, everything Sega, plus a few others. Tons and tons of pics and a full list on the auction listing. Obviously this is the most important part:
But the real question is how they acquired all this? The seller doesn't divulge any details other than to hint that it's a personal collection, though they appear to also be a dealer. So did one guy spend decades collecting all this just to sell it all when he hit 100% completion?