New a fully built chasis would see you about £250, but recently there were 2 as new Sprint 2s on ebay for under £100! Decent thing with drifting, is because of the low grip levels, you dont stress the motor much and with new bigger capacity batteries, you can see 1.5hrs out of 2x 4500Mah batteries
The hunt on ebay last night didnt throw anything really up, will continue today, if you find anything chris, drop us a pm