I might be a bit late with my answer, but overall the ender 3 is a decent beginner printer. I've had no major problems with mine.
You and others please note that there are 4 different models of the ender 3.
- ender 3: loud board and stock everything
- ender 3 v2, new screen, silent board, adjustment knobs for belts and a glass bed
- ender 3 neo. silent board, old screen, auto bed leveling (BL-Touch), glass bed
- ender 3 v2 neo: Basically a v2 + neo
IMO the neo is a sweet spot for beginners. It has most of the upgrades people do on their printers, while being cheaper than doing them yourself.
EDIT: just read that you're buying used. Depending on the price the v2 would be completely fine. Just add bltouch later if you want.