I question how many collectors are interested in the design of marking on the plastic parts of their chips. The fact that it is connected with an odd casino like MGM Desert Inn is likely to be of more interest.

However, I'm sure you can find some collector who wants every odd variation to come out of a factory. Since there are much less expensive varieties of this chip, I'd say that a reasonable valuation in this market would be a retail value of $20-40 with dealer offers of half that.