Wow, $215 a wheel is pricey. Ouch. Is that the place in South Carolina or whatever that's so well-known in the E39 M5 community? If they can get $215/wheel, more power to 'em.
I'm looking at about $100/wheel for powder-coating a single color, or $150/wheel if I wanted a two-step color like the shadow chrome. That's a well-known, well-regarded local shop that does a lot of really nice projects. It's extra if a couple of the wheels need any straightening or aluminum filling/welding on the rim. He said they usually just smooth them out, which I don't like. I'd rather have material added than taken away.
If anybody's interested, here's the guys I'm talking to...
https://www.facebook.com/armorpowdercoatings/
It's fun just to scroll through their photos to see the variety of projects. They do that hydro-dipping thing, too and have a couple of videos. Nothing I'd put on my own car, but it's an amazing process.
SC