The only known denoms to exist are $1, $2, $3, $5 and $25. There were not many $25's made - so they will certainly be hard to come by for your playable set needs.

Just so happens that I was fortunate enough to get 2 racks of the $25's. I don't think there are anymore then a dozen or two more out there. I know the guy who is selling most of these on eBay is either out or almost out of these $25 chips. Good luck!