The first first edition of Call of Cthulhu is up for auction on eBay at the moment. I was tempted for a moment but by then the bidding had reached $560 and besides, how could I possibly outbid John Kovalic? He gave me a jaffa cake once.
But there's still 5 days to go to get your hands on this shrinkwrapped piece of cardboard roleplaying history and a certificate of authenticity from the great shaman Greg Stafford. To show you what I mean, here's a picture of him defeating a lobster in unarmed combat.