Why would anyone want to deal with used parts? Customers expect a warranty and for a repair to last.
If I have a chance to sell a part it will be one that doesn't haunt me. A customer needs some expectation of good results.
If your selling a part as a used part you won't make the profit you will on a new part with a warranty. How can you warranty a used part ?
I expect there are some that sell old parts for new. A bit of spray paint, clean up a bit. But that's unethical and fraud.
The stuff's worn out and has an unlikely chance of lasting anywhere as long as a proper repair.
I should have played the g'tar on the MTV. MK
You can be anything you want......As long as you don't suck at it.