Don: 3D printing is in its infancy. I have a printer, it is not working right now because I need to replace the part of the extruder.
What exactly do you want to do with the printer? What size? X, Y. and Z dimensions? That is the first couple of questions.
Get an assembled printer, not a kit. Make sure there is good community support for that printer. Don't count on company support.
There are two main types of printers:
Extruder and filament printers are cheap and need attention to detail to work properly. Not every print will be successful. Plan on failures. Prints take a LOOOOONG time; Hours to days (for large prints)
Resin bath and laser printers are much better and MUCH MORE EXPENSIVE.
YouTube has a channel called "Makers Muse" some time ago he posted a video on the prices from $200 to $1,000,000.
Thingiverse has thousands of 3D models premade and free (mostly). Not all the prints will work correctly. There are services that will print your 3D models for a fee.