As used cars, they aren’t very attractive for 2 big reasons.

Repair facilities and even just new parts are rare and can take months to book (which is a problem for new teslas as well).

But a bigger problem is that Tesla iterates parts designs, so if you have a used Tesla and the door handle breaks, you might not be able to get the right part to repair it, or you might need to make a series of other changes for it to work.

When you buy a Tesla, your buying a test mule that is a work in progress. That’s why most car companies spend 3+ years developing traditional vehicles before coming to market. And they used decades of institutional experience and known good components instead of attempting to reinvent it all (even the manufacturing process, which Tesla learned hard lessons about early on).