1800 GTI in Lhasa Green - How Much?

Maybe I'm mad..but am thinking of selling my daily driver GTI….

Fairly standard car with nine spoke alloys
Approx 6 months MOT and tax,
140000 miles showing…
Lots of 'comfort' mods - EW, CL, 12cd changer, 6x9s in mdf shelf, vdo gauges (working!), side repeaters, interval rear wipe, twin lamp grille, uprated headlights with relays, amour plates….

Needs:
new rear arches, not obvious -  should pass MOT,
new tailgate (spare one supplied - needs spraying)
various cosmetics

Any ideas what it's worth?