The Elegoo Centauri Carbon (~$300) is the best value for single filament (their promised Filament Switching System has yet to be released despite being promised

The Elegoo Centauri Carbon (~$300) is the best value for single filament (their promised Filament Switching System has yet to be released despite being promised for Q3 last year), since DJI revenge-invested in them for the sake of the engineers who left that company to start Bambu Labs. It has an enclosure and heated bed which are helpful for printing specialty/engineering filaments. Flashforge AD5X (also ~$300) is the best value for single extruder multi-filament since it forgoes the expense of material to enclose it which works well for PLA (an enclosure is easily fabricated and installed). Note that they had a recent social media gaffe where they claimed that they would report manufacture of weapons, but have since walked that back. I own both of the above, and print from USB sticks w/o connecting to my network --- I'm pretty sure that's possible with most if not all printers. The Snapmaker U1 (~$1,000) is the most striking value for multi-filament since it minimizes "poop" (extra filament extruded when changing colours). If you want to support opensource, then one of Prusa's (they cover a wide range of price points) --- they have been pushing the "INDX" printhead technology which allows fast/efficient switching between different filaments.