I'm in the same boat as you Jim.
I have every $5 Hard Rock except the Puma. Nice looking chip, and I'd love to have it NOW! I've been following the Ebay auctions on this chip too. BUT I have decided to wait it out. I'm collecting $5 uncirculated Hard Rocks for the long haul. I recently broke down and bought the Roth set and Ozzie dog chips. I did so after watching these chips and their values for years. I felt their values and availability have stabilized.

I'm now collecting a second set of $5 Hard Rocks for my son and a few of these chips are pricey, but I'm patient and I'll get them sooner or later. I find this part of the chipping experience and the challenge of collecting.