$5 - $10 is the correct value for the 1, 5 or 25 chips. I have 2-3 of each, always paid less than $10 each. Just bought another one of these chips this month, look at what I paid on eBay:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280505750011&ssPageName=STRK:MEWNX:IT