i paid 6,000 for mine..i haven't looked it up yet but he claims they have similar retail value...here is a blurb from his email about whats been done to the bike:

Cammed it up means sort of like in old sports cars when you you hear them barely running at an idle rumbling its a motor upgrade, on crotch rockets when you add aftermarket exhaust and larger cams and k&n filters and different stuff like that its hard on the gears in the cam at really high rpms and speeds, the gears look just like sprockets just obviously smaller, all the gears fit together teeth the teeth like sprockets together and in a normal bike they are kinda snug so you dont here any engine noise, along with the larger cam the gears are also loosened so at under about 3-4000 rpms which is pretty much an idle for my bike you can here the cam and then when you get up to performance speeds and rpms the gears tighten up and on a normaly cam and normal adjustment they get to tight and wear out fast or break but on the loosened gears on a larger cam at those high speeds the performance and wear and tear is very low because they tightened up just enough not to tight - I have never had it at top speed but I know the guy I got it from after the aftermarkets has had it to 170 not sure if it will do more than that or not but thats what he has had it to which I think it nuts lol, I never really good around past 90-100 and it gets there literally in the blink of an eye kinda freaky fast,