Thats because they all need a ton of money spent on them to really make them shootable and/or move fast in the retail market.
Remember, the descriptions tend to miss things like loose ribs, cracked firing pins, and in alot of cases, stocks worn dangerously thin (where has the chequering gone?) dimensions that are just not useable (pair of guns with wood figured like floorboards and 3in drop at heel - just doesn't fit the modern gent - restocking a pair of guns in good wood = $$$$).
I have been going to UK gun auctions for many years and bargain can be had but the catalogues are generally shy of the underlying issues. The trade don't want to buy junk and the public are now understanding that remedial work on a gun can be a money pit.