In the $300+ range, IMO.

I did a check on Ebay, and I see that one sold at $330 in a competitive auction ending on August 14.

That bid history shows 3 bidders, including the winner, at $300+.

The chip is also pretty hard to find, though I saw at least one (maybe 2?) of them at the club annual convention in June. I don't recall prices on those, as I had one, and wasn't in the market for another.