Doug,
Were you asking about the ones that were on ebay? If not, check them out for values.

A couple of weeks ago we found a Harrah's paper coin cup at an antique store for $3. On ebay I would expect it to go for $15 or more (depending on who and how many are bidding). A cup from the Sands or Dunes would probably go higher than that. I'm including a link, this seller had a few of them go off--so you can check his completed auctions, if it will help.