Hehe, or WotC should have bought it as evidence of the enduring popularity of their game system.
If you take a look at it, they actually increased the estimated price, possibly because of all the additional traffic from the gamers going to the site...
Correction: The links in the original post didn't go to the roman d20, they went to "An Etruscan terracotta cinerary urn". The Roman d20 is here and went for 17,925 bux.