Whats it worth?

[IGALOP]

Just got an AU 2 White Wagon Forte. It is a 6 with Duel fuel (68L) each of Petrol and Gas. Unmarked white Duco, Grey interior, Auto, LPG system is only 15 months old and is the newer direct gas injection system with uprated chip for improved power and economy that matches petrol for power but uses 5-10% more on gas. LPG system is still under warranty.
Have now fitted (5 off) BA XR8 18 inch Alloys with 245 rubber on rear and 235 up front.
It's also got electric braked towbar setup, tinted windows, dashmat, new rear rotors & tailshaft, Seatcovers, floormats, cargo barrier, and really goes exceptionally well. No rattles or squeaks and full service history.
What should I consider it's real current value to roughly be?
(Also have in the garage a White 67 Mustang Coupe V8 in exceptional condition.)

[Kryton]

$4000 and thats only because of the LPG set up its running.

[Beer Baron]

I agree with davway, I tried to sell my au2 SR for $4,000 with a rwc and it was very hard to get any bites.