Everything Rails sells seems to go for a lot - more than it would do from most other sellers.
I've only ever bought a handful of second-hand items from them (some through ebay, some on their website), and wasn't impressed with the most recent - a Class 50 - it wasn't as good as described and there were several small parts missing. I decided to keep it anyway, but did email them to point out the problems and suggesting that they gave me a discount on a future purchase. They did agree to this, but the amount offered wasn't a lot considering the price paid (ironically, I'd put up with paying a high price because I thought they could be relied on!). I've not taken them up on the discount yet - I'm wary of anything second-hand from them now, and for new items - which I've not bought many of recently anyway - I'd prefer to use the local model shop.