FWIW-These hit Craig's List, Las Vegas and...
also eBay from the same seller. Not included here is a rack of the 25 NCVs that went to another buyer. According to the owner of these (Ulysses (a screen name on ChipTalk.net)) the 500's and 1000's were about $3.00 each.
For the time being, these are locked up in a "playable set" (large home-game set).
(photo courtesy of Ulysses, ChipTalk.net)
Jim