I'll give it a shot of a few of them.
The Coupon I would say around $40-50, the Obak around $35-40. The T205 Wallace maybe $60ish. The Piedmont Art Stamp should go for a bit more as they are quite scarce and just don't show up very often. I'll let a collector of that set give an estimate on it though as I just don't know. The others I'm not sure of.
You should be able to get knowledgeable responses as mine are what I might ask for these and I have a tendency to ask low prices for some reason.
Best of luck with these.
Andy
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