coolflame57 wrote:Going back to my original question, how much could I charge for something I restored to a perfectly working order? Is this just a can of worms if it keeps breaking and customers keep returning their broken objects that I fixed?
If it's indeed in perfect working order, I don't see why you can't charge whatever the used market allows. I don't think this is necessarily a can of worms, but in order to be successful you'll need to find the right items with the right type of problems.
Number one, you'll want to make sure there's actually a sufficient demand and market for that item in used condition. If the demand is there, the profit margin also needs to be there (i.e., can be acquired for relatively little when "broken", sold for significantly more when fully working). As for the repairs themselves, you'll want the problem to be something which doesn't meaningfully degrade from the item, once restored. You'll also want it to be something which has a relatively high ease of repair, but not so easy that the average dummy can do it with zero skill/knowledge.
If this is your wheelhouse, I don't see why you need to limit yourself to PC components either. Could try your hand at audio equipment/speakers, or mobile devices/accessories (a bit of competition here though).