Buy it, run it till you've had your fun and filling up the tank takes the smile off your face and then............
Flog it, and hopefully as you bought it at mates rates, wont loose any cash.
Trouble is with my plan, would you get the sale price, we know V6's are struggling and a 5.7 hemi would scare me off. You would have to do a bit of research and see what they go for.
Always bung a few quid your mates way if there is enough cash in it.