"The Chip Rack", in the 2004 Ed. of the price guide, lists them for the following:

$5---- $100-124 each
$10--- $125-149
$25--- $150-174
$50--- $150-174

If you sell all at once to a chip dealer, they would probably offer 25 to 50% of these values. It would take them quite a while to recoup their investment and make a profit. There is also a great possibility that adding 50 of each to the marketplace will reduce the value of each chip.