Tom, I'd take issue with on Brit game guns need be pricey. The W&S you are asking about is a prime example. Just about any Brit gun weighing 6 1/2# in 12 bore will be a game gun; your prospective gun would actually be considered a light game gun.
Value. W&S is Brand Value level three - BV3. The gun itself will fit to "second level boxlock ejector" - Original Quality grade six - OQ6. Nice, serviceable gun with no apologies needed, but not a "best work" gun, either. Current Condition level sounds like "significant use;" CC3.
BV3-OQ6-CC3 = $2,320. Make it plus/minus $500 and you have the likely envelope of possible values.
Hope that is of some value to you.
DDA
