Website for obsolete chips?

Today I won a storage locker and in it was a chest with about three hundred casino chips. Lots of $1 clay and silver, and about 60 $5 clay chips. Most of the $5 chips are commemorative ones, 2nd Anniversary Silverton, Elton John Red Piano, 10th Anniversary Stratosphere., etc.
I know casinos change chips, but would these $1 and $5 chips still be valid? There are plenty from now defunct casinos that I plan on eBaying, but if I could make a chip run on the Vegas ones,I'd rather do that.
Is there a site that would let me look them up?

Google chipguide. It might even be chipguide.com

That site just shows what the chips look like. It doesn't indicate if the casinos will accept them or not.

I don't think I can really be much help. The Nevada Gaming Commission has a chip and token report that you should be able to find starting at gaming.nv.gov and clicking on About Us, then on Publications & Statistics, and finally on the title of the report.

There are a few things there that will not satisfy you: (1) There is not just a single report; there is a historical report with info up through about a year ago plus monthly reports since then, and (2) the reports talk about chip designs that have been submitted for approval and accepted or rejected.

The reports don't cover whether a chip has been withdrawn or cancelled. I think that is handled by each casino individually, with requirements imposed by the NGC. If there is a report available that covers withdrawn chips from all casinos, I don't know about it. I think you have to contact each casino about each of their chips to see whether they still accept it.

Even if some of them are still redeemable, my guess is that if they're not still being made by the casinos, a chip collector would likely pay more than face value for them.

Thanks for your responses.
Many of the $5 chips are listed for sale on eBay for $5-10, but after 13%fees, and the effort of shipping them individually, a casino run just seems more efficient.
I appreciate everyone's efforts. I guess I will just do a casino run and find out.

I've never tried it, but you might be able to answer most of your questions with a "casino run" on the telephone. Then you only need to travel to casinos that still accept the chips and either redeem or gamble there, depending on your inclination.