I've been meaning to buy a Medium Format SLR for quite some time after discovering the joys of MF with my Yashica Mat-124G. I recently put out an ad and recieved a reply from someone wanting to sell his Mamiya RB-67. However I'm not sure how much I should pay for it. He is selling the camera "as-is" (no guarantee of function), but claims to have tested the shutter and body. He also says that the shutter in the included lens (a 250mm) is slow, and probably in need of repair, he doesn't mention a film back but I assume it is included. He wants 2200SEK for it, which is roughly $340 (including shipping). Would you say this is a fair price, or would I be better off picking up something on the proverbial auction site?