An El Cortez $5 chip sold for $9,999.99 on ebay back on the 16th of March
Link to auction: http://www.ebay.com/itm/2202-IMPOSSIBLY-RARE-1958-EL-CORTEZ-3rd-Ed-5-Casino-Chip-L-V-No-Reserv-/141226670989?pt=LH_DefaultDomain_0&hash=item20e1c3fb8d&nma=true&si=m5%252FTuK%252BEEqYIF9GsKCJ%252FjTwskeY%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557