This Sahara 50c chip was listed on eBay and closed with a decent final price of $23.27 (not me).

I found it interesting that the seller was not a typical seller, but was the Goodwill in Maine.
They seem to be pretty experienced, with over 72,000 feedbacks.

Anyway, I'm guessing they probably found it in a pocket of donated clothes, and rather than sell it locally in a store for a pittance, they maximized the sale via .

http://www.ebay.com/itm/Hotel-Sahara-Casino-Las-Vegas-Nevada-50-Fifty-Cent-Chip-Purple-/301980721518