I am a firm believer in "caveat emptor," but when I see something like this, I feel bad for the saps that are about to drop 3 times as much (or more) as these chips are worth.

http://cgi.msn.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3272717510&category=899

Of course, I'm making the assumption that these chips are unattributed. I'm also making an educated guess on the mold designs (the photos aren't very good), but they look like hubs, diamonds or large squares (or a combination thereof)...which puts manufacture dates some time in the 20s, 30s or 40s.

Would it be "unethical" of me to drop an email to the unsuspecting buyers? How about an email to the seller?