I have been an ebay seller for many years. Not anymore. I was selling an item before Christmas which was peak time for this item. I received several offers and was about to accept one when it was rescinded due to a bid. The auction ended a week later and another week later the buyer still hadn't paid. The buyer emailed me that they had changed their mind. Now it is too late to sell it and ship in time for Christmas, so it cost me my sale.
I tried to report the unpaid item on my phone, but it was so small as they don't have a mobile version of this part, and I accidentally cancelled the unpaid item report. I called them and had to wait 10 minutes. They told me they can't created another unpaid item report and would manually refund my final value fee. This took another 20 minutes. They then threatened me saying that this is a one time courtesy and I shouldn't mess up again when it was clearly the buyer's fault for bidding on something they didn't want to pay for and their fault for not having developed a mobile version of this part of their site and making it so easy to make a mistake and then making it impossible to undo the mistake.
I asked if there is anything else they could do after explaining the situation and they said no I would just need to relist.
Now I am out a sale and have to wait for a refund of the fee and do not have any other chances to make a mistake. There are much better selling platforms out there these days so why bother with ebay. They have the least fees but it's obviously for a reason. Try mercari, poshmark, tradesy, etc.