What are you calling "reasonably priced"?
There's rectangular dollies that go under and there's the "twirler" kind like I have
where you can both remove the body from the frame or rotate the body once off the frame. I think I gave about $1600 for that 5 years ago.
Try some place like "auto body tool mart".
https://www.autobodytoolmart.com/ look under "car dollies".
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