It is a lot of money but for a complete setup it is probably fair. I don't know how much boost they put out but they were a neat idea for an underhood blower. The ones I've seen are $5,000 to $10,000 without the rest of the equipment. I think Karol Miller had one on his 55 for Bonneville.

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

This isn't mine and I have no connection with it, but I thought it looked entertaining and worth sharing.  Plus, it's certainly our of my price range.

https://sfbay.craigslist.org/eby/pts/d/brentwood-latham-supercharger-blower/6888589844.html

Don W
55 'Bird, 56 F100