Rob
I wouldn't go as far as breaking it entirely if i were you!
To maximise your return the best way would be to put it back to more standard form and sell the bling/performance bits seperatly. Your car would easily be worth 8k+ with say stage 3 and the extra's a few grand more. Obviously this involves a lot more work and a small outlay for standard bits if you don't have them already but selling good qaulity cars can be like pulling teeth also