ScoobyNet.com - Subaru Enthusiast Forum - Whats my 2.5 type R worth??

I am looking to sell my grey type R STI V5 (2 door) to fund a house extension.

But Im not sure about how much it is worth!

A standard car looks to retail at about 9k, but I have just spend over £11k on the parts for the mods, and more £ks on labour to fit them! So it stands me for more than £20k. I know Im not going to get all the money back but what is a sensible price for it? Its going to be somewhere between the 9 and 20k, unfortunately for me I expect maybe near the lower price than the 20k!

I got the 2.5 conversion done about 500 miles ago by Rick at RE motorsport - top man. I spec-ed it like that as my intention was to get it to 400 bhp with a different turbo later on in the year. All the mods are done with quality parts:

2.5 Modification by RE Motorsport:
- 2.5 STI Block with STI Internals
- Roger Clark Motorsport RCM Uprated oil pump
- APR 11mm Studs
- Roger Clark Motorsport RCM130 ultralight flywheel
- Roger Clark Motorsport RCM324 Headers with Woof coating
- Roger Clark Motorsport RCM04 Induction kit
- APS WRX-HOE/R1 Exhaust 995-019-100
- APS WRX High Flow CAT
- Fuelab 51502-1 EFI Regulator
- Sytec (Walbro) 225 fuel pump
- AP Racing organic clutch
- New V5 STI P1 inlet manifold
- Boost Control valve 3 port valve OEM

- Motec M800 OEM ECU Supplied and Fitted by Owen Developments

Standard type R kit:
- STi intercooler water spray (auto and manual)
- STi 5 speed close ratio gearbox
- STi short shifter
- STi Driver control centre diff (DCCD)
- STi grey/red suede bucket seats
- Power steering
- Twin airbags (not always present on STI type R V5s)
- Aircon / climate control
- Electric windows
- Electric folding mirrors
- Factory tint on rear screen and quarter windows
- Rear wash/wipe

Other Extras:
- Braided Brake Hose and ends
- Pagid Blue Brake Pads
- Tint on driver and passenger windows
- Intercooler protector grill
- Defi Gauges (oil temp and pressure and boost)
- 17" Rare Rim alloy light weight wheels and Toyo T1-R tyres
- Thatcham Cat1 alarm
- Tracker
- CD player

Performance as measured by Owen Developments (top mapping people in Oxford) during mapping:
- Power 345 bhp
- Torque 322 lbft

History:
- David Hendry Cars imported the car when it was new from Japan
- Was first registered in the UK in January 1999
- Service history from David Hendry Cars and recently by independent specialists Scooby Clinic and RE Motorsport
- HPI clear
- 54,500 miles

What should I be asking for this?