You've obviously already made the determination that framesets made for Keirin are pretty cool. I agree. The prices can vary greatly, for many different reasons. Brand name, paint color, and condition are all factors when it comes to asking price. Keirin can get pretty sketchy, so NJS framesets often have dented top tubes, or even front end damage from accidents. The races typically go on, rain or shine, so I have also come across a few with rust issues. If you decide to pull the trigger, just be careful. Do your best to inspect the condition, and always ask questions about anything you are unsure of. If you happen to purchase from Japan, I suggest paying the extra for DHL or FedEx shipping. I have had a few framesets make it to the US in a few days, just to sit in customs for a month and a half. Good luck!