As far as I'm aware chaps there were only about 1500 XBR's sold in the U.K. During it's entire run, so not many. One would think that the supply and demand would keep prices pretty keen, but then again if say for argument sake there's only around half the 1500 left on the road, then surely they must nearly all be in reasonably condition so not requiring lots of parts/spares. Who knows tho with these things, like you say Martin, sometimes that's just the way the market seems to go.
Cheers, Michael