Parts of that WOC are reasonably rare though. I don't think you'd ever find a buyer willing to pay that much (or even 20-30% off that asking), but it could be argued that it's worth that much on paper. The mags especially are impossible to find.
The problem is that the WOC/WA just doesn't perform like a gun that costs that much. It's a very old design and they look great, but the bolt is very heavy, which is a problem in UK weather for 6 months of the year.