My first turbo 4x4 was a Mazda 323 4x4 turbo lux & still got it as love it to bits & pointless selling for next to nothing. Ford Cosworths, Evos, Imprezas, Intergrale became popular through good motorsport results & people wanting the vehicles thus creating popularity status. Any car is worth next to nothing unless people really want it & with the GTiR it just lost out at every level, poor motorsport results, poor uk, eu sales & then poor opinions due to a few abused grey imports that got kicked around the uk second hand market making them undesirable.
GTiR is a bloody steal of a price for a superb hot hatch that far more fun than many of the main rivals & far more reliable & rust free than the average intergrale for example.
Just be happy you can buy & maintain them cheap, GTiR is best used, leave the fords & Lancias in a bubble in the garage :-)