A nice HW 55 Custom Match must be worth £250 and perhaps a bit more as it is the best looking of the 55 Series (IMHO of course) and one of the most attractive air rifle ever made. Although the rifle cylinder is quite small the rifle can be tuned from 5.5 ft lbs up to near the 9 ft lb mark
When I bought mine it was putting out around the 9 ft lbs but I have fitted a much weaker spring to bring it down to just less than 6 ft lbs for bell target shooting
Link to nice pic and article of a very desirable break barrel airgun.
http://www.pyramydair.com/blog/2011/...-match-part-1/
The FWB124 and a HW55CM are my favourite B/Barrel airguns