Re: these wheels on amazon Mophorn Pottery Wheel, previous answer re: amazon:
Previously:

To quote u/drawerdrawer "The amazon wheels are cheap and dangerous. I have one and not only is it not grounded (it says it is), but the motor on it pours out smoke while centering. I mean, buyer beware, but there's no cheap way into the wheel market apparently."

Well, the cheap way into the wheel market is to offer to clean someone's studio with a toothbrush from ceiling to floor and use their wheel when they aren't. (Been there...) It doesn't cost much, but some folk may consider that to be expensive :)

The downside of these amazon heaps of crap is that: a) something wrong? no customer service. b) it's a heap of dangerous crap. c) no one in their right mind is going to repair this when the option is to repair well known wheels with spare parts etc available d) when it carks it, how you going to get rid of it? e) amazon.

It's great and wonderful that folk want to get into wheelthrowing. I highly recommend that you explore your other options which are outlined in the FAQ: https://www.reddit.com/r/Pottery/comments/mzo4ls/frequently_asked_questions/

re: finding a wheel:
Previous answer: All I can suggest is that you find your people locally, perhaps volunteer for someone/an organisation in exchange for wheel time in order to keep your hat in the ring and get the word out. There's a very good chance that the more that you're involved with other clay folk locally, the better your chances will be if you let them know what you're after.

Re: what to look for - in the FAQ: https://www.reddit.com/r/Pottery/comments/mzo4ls/comment/gwbcc5p/?utm_source=share&utm_medium=web2x&context=3

ie: major manufacturers such as brent, shimpo, nothing off amazon. Buy from niche ceramic folk who know what time it is in pottery land.

Also guessing that you may have local ceramic facebook groups and suchlike - do the hunt and see what you can find. Asking in those sorts of places and/or finding ceramic trading groups online in your area can often be fruitful.