Bryant A.

My best advice is to, before you purchase anything, make sure you look at sellers' reviews for a bunch of recent and past canceled orders. Sellers can cancel your ALREADY PAID FOR order for apparently any reason. Once that happens you can't rate them. So a seller who cancels the majority of their customers' orders can still have a 5 star rating. Fine when it happens once, but when it keeps happening it gets downright infuriating. And Mercari's almost nonexistent customer service is no help either.
Ebay, from my 15 + years using their site, jumps in as soon as you report a problem, and, very even-handedly, will try to resolve the issue. They don't shield the seller from negative ratings and will, in case they decide for the seller, will even negate a negative rating. At Mercari, you, the buyer, are left twisting in the wind.

Started using TeamViewer as a personal user to simply help family and friends remotely with computer problems. Always the same 4 computers and sometimes weeks apart. Well TeamViewer started to send me messages stating that I was suspected of using it for commercial purposes, which I ignored since I wasn't using it for commercial purposes. This message popped up every time I used the program, which, mind you, was still about 2-3 times a month. Then suddenly they revoked my access and I couldn't use it at all. I contacted their customer service through chat and told them the situation. I was told it was nearly impossible to restore access once it has been terminated. The rep asked me what I used it for and I explained and he said he would try to restore my access. He subsequently informed me he could restore my access for a $75 a month plan. I reiterated that I barely used it and he had the logs and my user history to verify that fact, but he still insisted I had to pay at least $75 per month to have my access restored. I told him where he could shove it, and have been using Chrome Remote Desktop without issue for over 4 years now.