[Closed] Tempted to seperate but ideally sell

I have just purchased my Dream bike (Orange Five pro) and need to get some funds to bump up the bank balance. I want to sell my 2008 Marin Quake 7.3 has a decent spec, upgraded the seat post to a reverb, not really sure what price i can get for this - i paid £600 about 6 months ago before i changed the seatpost (£125 for seatpost) and the tyres - racing ralphs. What ideally can i ask for it - it is mint heli tape been used on all the potential rub areas and it hasnt been ridden that hard at all?