Don't have a clue, but the seller is funny. Things are Rare or Very Rare, which I suppose is better than Rare?

Selling display cases and writes of traveling the country and doing shows.

Says he doesn't believe in making money on shipping and charges $3.75 to ship a strike. But that maybe be special Rare postal rates or very rare packing?

It's just a not so rare eBay thing to list everything as RARE even though most people got past that long ago and know better.

By the way, the display cases are tempting. Only $6 shipping and they hold 35 chips or 36 strikes. I wonder which one the auction is for, or is he selling multiple "choice" items with the same sale. (hint: against eBay rules)