Price is often higher where there is a recent service, as a seal kit for one of these is £70 just for the seals. Also can be more if more than just the pistol, even in good condition. Bits that could add £200 to a pistol would be FWB hard case, spare sight elements, weights, tools, manual, associated paperwork like an original receipt. Price is also variable depending on how many come into the market at any time. Holts have quite few on the sealed bid December sale, and while you will have to factor in sales percentage and shipping you can either watch to see what they go for or put in a bid and see what you get.