Quoted from kwiKimart:I don't understand why people would sell them in the first place, but good luck to all.
They didn't. The games weren't selling, so Williams decided to try promoting them as a special run, and created and sent the collector's plates out to the distributors to give away with the games. Supposedly, most distributors didn't get the right numbers, or had already sold the machines and didn't follow up, or didn't match the right numbers with the right machines, etc. So, it wasn't like half of the original CC people got them and decided to sell them on eBay or something, they just didn't get them to begin with.