I believe there's a MPB on the east coast. I think they have a store but I can't find an address for it.
The astro stuff might rule my pick out. But it's such an oddball camera that it's hard to find anyone using it.
The Sigma SD Quattro H. It's the only camera that is different that ALL the others. Do some reading about it. Look at sample pictures from it. I have not had the pleasure to own one, I came close.
https://www.dpreview.com/reviews/sigma-sd-quattro-h
fwiw, I shoot on a Sony A99 for now. I'm looking to upgrade to a Canon R5. For the work I do, motorsports, it's what I'm after.
*12-22-2023 edit*
I bought a Sony a9 as my new to me primary camera. It's really cool!