I have an 07 kx250f for sale pretty much stock and someone wants to trade me a 2009 rmz 250 bored out to 290. Has Athena big bore kit rebuilt 13 hours ago. Has too much power for the kid. Clean bike pro taper handlebars powerbomb header and breakaway levers. Lot of aftermarket stuff. Was wondering if I should take this on a trade to sell for more?? I have no clue the value on something like this. Need help!! Post your opinions. Thanks a lot!!!