Well, good job to you sir lol, I doubt anyone else had that luck unless you find someone with one that doesn't know what they're worth. I cant find any in Colorado or surrounding states for less than 800$. I even found a guy selling a miata with hardtop that had some body damage for 1600$, I offered him 500$ for the h-t, and he said no way. I will continue to look, but I highly doubt I'll get one for less than 500$ haha.
The wheel specs are 15X8 -12, most people with miata's run 15X8's, it's just the offset. I'm not daily driving the car on the RPF1's, no way. I wanted to get a set of wheels that were cheap, strong, and gives me some stance. Yes, I like stance. May look goofy, but I dig it. So, these wheels did just the trick.
And yeah, I can find them for pretty cheap, they will come, but I have higher priorities than getting new wheels, IE: hardtop, roll bar, etc