I am currently shooting a gun I bought from someone who was packing up shooting. I knew the history of it, because I had taken the owner to buy it in 1992. A Classic Doubles 30" Trap gun, with 2 sets of woodwork, Trap and Sporting. I paid under £600 for the gun and 360 cartridges. It is not steel proofed, has ported barrels, BUT, weighs 8lbs. Almost 1lbs lighter than my ProSport. I have put an unfinished Isis recoil pad and an Isis comb raiser on it, and I am shooting it exceptionally well. This is entirely due to lighter weight and gunfit. OK so it is over 30 years old and with the temporary bits stuck on, looks like a 'Blue Peter' project, but my scores have gone up and STAYED up, since I started using it.
Cost of the gun is irrelevant, it is the fit and how it suits YOU that matters.