California, Arizona, New Mexico, Colorado. I've got some from lots of other places too. Happens when you end up buying a mixed lot of chips on eBay. And then you see some are really nice in the lot you bought and the next thing you know you're collecting that casino too
Stick to a budget! Otherwise this can get out of hand. It's one of the things that makes this fun is that you can set a budget of say $10 - $20 a month and still find goodies to add to your collection. If you go to $100 -$200 a month, you're either going to be rolling in chips, or have the ability to buy just a couple of better chips. Either way, give some thought to how you are going to store and catalog your collection. Getting off on the wrong foot on doing that will cause headaches later on