

The only prebuilts or kits I recommend currently are from Prusa. Fairly open and they have a strong track record for reliability.
If you’re willing to build, you might take a look at the Voron project. I hear good things about them, though reliability is largely up to your mechanical and electronics skills. I believe one or two of their builds are roughly in your price range.
That said, my wife recently surprised me by preordering the Flashforge Creator 5 Pro (Not really in your price range) as a gift. They seem to have a fairly solid track record for reliability, though they are not much better than Bamboo in terms of openness. They have other printers and I’ve heard mostly good things about their AD5X and Adventure 5M Pro which are more in line with your budget.

In one of their more recent asshat moves:
https://www.tomshardware.com/3d-printing/developer-re-enables-3d-printer-features-that-bambu-lab-disabled-firm-promptly-threatens-legal-action-orcaslicer-bambulab-project-now-shuttered