Paranoid chips are quite old - let's estimate these sorts of chips as 70 to 100 years old. They aren't rare, lots and lots of them were sold. Fakes have begun to show up. The fake boxes are better fakes than the chips themselves.
The costliest Paranoid chips in their day were the monogramed chips - a single letter on a plain background. In today's money, these were something like $3 to $5 chip. $300 - $500 per rack / box. Serious money in the Depression era or WWII
The other designs were cheaper, but still comparable to what we might currently pay for casino used Paulson chips.
There are a lot of options available. Not so easy to assemble a playable set though. I often found my chips in smaller lots - I avoided singles because the shipping costs. The chips themselves cost me between $0.10 and $0.25 back in the good old days. You will pay more for them today.
You will find iconography that has current meaning different from a hundred years ago. "Nazi" chips are good luck. The double star chips aren't Jewish. Same thing with Islamic images. Making sets of these images will be a bit tougher.
These aren't what we think of as clay chips. More like a plastic perhaps. They sound different. Something between a metallic clink and the ringing of glass. Perhaps a bit slippery too. Not dice chip slippery, but nothing like a Paulson style brick. No chip towers with paranoids.
Fun old chips. Takes effort to build a set. these days, such as set would be pretty unique. -=- DrStrange