I found a coin shop that has a couple of the sands plaques (pink 100 and yellow 500), However he's WAY above book ( and WAY above what I think they're really worth). I want to make an offer, but I really don't know the real street value of them. can anyone clue me in please. I know "Skip" Harouf recently sold a set here, so i know someone knows.

any help would be apprecited.

Thanks,
Shawn