The Harolds Club pan chip is pretty scarce. This chip is not really worn but has lost a lot of gold in the hotstamp (cleaning by previous owner?).

4 Bears is one of my "Favorite molds of the week" on the Club web site.

One of the Spirit Mountain chips is first issue and obsolete but I can't remember which.

Check the Riviera to see if it's a variety you need. Here are the varieties as I see them:

Note that the denomination is shifting relative to the red ink in the Riviera name; this isn't just misregistration of color in printing.

First row is $10 each
Second row is $5 each
Remaining chips are $2 each

Postage is $2 for any number of chips.