Parts: Yea, that was one of the first things I checked. I perused BikeBandit.com's OEM parts and, one the microfiches that I looked at for the Seca II, they seemed to have plenty of parts. I should also be able to find tires pretty easily. The rear tire is difficult to find, but on a Seca forum I found some alternative sizes that people have had success with. I can get Kenda tires for about $70/each; not bad considering the rear tire for the GZ set me back $130.
I do need to check on the chain, though. I'm glad you mentioned that.
I'm gonna try to check the bike out tomorrow, if the guy ever calls me back. Right now the auction is at $630, so I'm hoping I can snatch it up for under a grand. That will give me plenty of breathing room for parts, repairs, etc.
BTW, here is the auction:
http://cgi.ebay.com/ebaymotors/Motorcyc ... 06.c0.m245