Be aware that the prices that the Replacements folks charge is seldom realized on eBay. EBay selling prices are usually from 20 to 40 percent (with some exceptions) of the prices listed on the Replacements site.
Check eBay completed auctions ( http://www.ebay.com/csc/i.html?rt=nc&LH_Complete=1&_nkw=culver%20glasses&_fln=1&_trksid=p3286.c0.m283 ) for tumblers that are like yours (or are somewhat similar to yours) to see what you might get for your glasses on eBay. Pay no attention to prices for tumblers that did not sell. They did not sell either because they were priced too high (usually the reason), or brecause there is no interest in that item at this time.