Like selling a used car, you're better off selling it by yourself then going to a carmax or a another car dealer.
You can always eBay it with a minimum bid or sell it through Craigslist if you don't want to pay a fee. Other place for quick cash is a pawn shop, but I think you're better off trying to sell it here before moving on.
Here's one that was sold recently on eBay
http://cgi.ebay.com/Vintage-Rolex-Oyster-Date-SS-Ladies-Wrist-Watch_W0QQitemZ370157805097QQcmdZViewItemQQptZUK_J ewelery_Watches_Watches_MensWatches_GL?hash=item37 0157805097&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A13%7C39%3A1%7C240%3A1308