Look for genuine English proof marks. Best to obtain some idea of what to look for that are correct for the period in which the gun was made. Nitro proof or black powder proof can have a bearing on value. You will want assurance that it is still in proof. Not an offence to sell an out of proof gun in the States but it would attract a sizeable fine here in Britain. If the barrels are badly pitted and the action is worn or the stock cracked it is not worth it unless it is one of the very highest quality guns and then cost of renovation may be in keeping with the value afterwards. One tip with Westley's is that they mainly had the proof marks engraved in rather than stamped; something the proof house will do for a slightly higher cost. Westley Richards trade mark is a triangle somewhere on the breech. They are also generally of high quality. They have full records available and can confirm the identity of the gun. If in doubt about anything make sure that you can get a refund if the gun is not what it seems. Some people confuse Westley Richards with W. Richards. Guns marked W. Richards may be anything from a well made gun by the firm of W. Richards of Liverpool and Preston; still in business and again with full records, or else a dreadful Belgian gun marked W. Richards made to trap the unwary and exported to the States in large numbers. Could be a bargin but could be trash. A bit of research will pay dividends.
I think I would smell a rat if they are reluctant to allow a viewing or inspection prior to sale. I would query what they might be hiding. Caveat Emptor! Good luck. Lagopus.....
