If you want to buy Nevada chips off eBay or anywhere else, purchase at least one price guide like The Chip Rack by those Knapp and Myers (and their friend Ernie Wheelden) fellows that posted replys (TCR) or Campiglia and Wells The Official U.S. Casino Chip Price Guide. The price may seem high at this point in your collecting career but in a years time you'll have them worn out. Be sure to read all the notes in these books for helpful collector hints and don't be bashful about posting on the board or joining CCGTCC if you find you like the hobby. The guides are available from most of the nice folks who have banner ads on this site.