Is the face plastic or glass. Is the can metal or plastic. Close up appears to show deterioration which you can expect to continue. On the other hand $500 doesn’t purchase much in the advertising world today. Point out the flaws and present a low ball offer and work from there. From your initial post he has had this available for over a year and not sold it and I doubt he has been holding it just for you. I would probably try to buy it but loosing $500 doesn’t bother me much if I like it as it is offset by gains on purchases from the 70’s and 80’s. If you are a AACA member someone in your club is probably a memorabilia collector. Tell the dealer you are very interested but would love me to show it to an expert before you buy. Let us know what you decide and thanks for posting.