I tried to sell the engine brand new, when the bike was new in the crate. Had it on ebay for $2400 or offer. Most anyone offered was $800. Had it sold for anything close to $2000 could have found a decent KX500 and been building the AF.
If you search the 450F forum on thumpertalk. Pretty common for the 06's to have wristpin problems. Dealer fix at first was to use an updated part number, then an 07 part number. Most guys who do their own work, like me. Just put in an aftermarket.
Yes the bike has an hour meter.