A few of the individual tokens do well on eBay but most auctions I've seen go unsold. The Queen Elizabeth 2 token seems to always do well. The $25 Caesars Palace and Desert Inn, the only two domestic tokens in the sets, always sell well. You can still redeem the Caesars, I believe.

The sets frequently wholesale for $200 or less, usually not far from melt value. The red-box set is the hardest to find.