Nah, not worth it.
The last time I called him in December he swore at me and hung up the phone after mentioning that we effing home-based sellers had no idea what overhead was, he has 25k/monthly overhead and was sick and tired of me calling to inquire about the status of my orders (about 4 months behind schedule). Given, I did call at least once a week.
Subsequent emails went unanswered. He owes a lot of people money and that is likely why he snapped when I called.
Technically, he has the ability to copy and manufacture the parts we sent him, so he could simply claim they were his in the first place.
As I said, I moved forward but just let that little URL get the better of me one morning and called support.
The gist of my post was not to complain about the bad apple but simply to point out how dangerous eBay advice can be.
We are doing really well and my focus is not on competitors. Actually, except for this exception, I uphold and honour my competitors, supply them with merchandise if required and sent them referrals if I don't stock the product.
Way less stress, much happier life 🙂
Bernie