Dont think it matters too much. You seem to conclude that prices go up based on one bike, and we can all take a guess why, but no one knows for sure. Its also hard to compare when we dont know how much they were out the door in your country.
I think its a combination of the other bikes in the segment not beeing as good, and the relatively low volume of wr250r's purchased in europe
For me, and mine, I wouldnt sell it cheap, because its hard to get another, and I dont think any of the other companys compare (klx250, crf250l ect ect)