I'm happy to announce I have finally done what I should have done long ago and taken down what was left of my book inventory. I was one of the few survivors from the era when Amazon sold books and indeed offered us an umbrella under which independent booksellers could offer their wares, before it became just a greedy corporate grabbing machine where it doesn't matter what you sell or whether you even see your own goods before they are shipped to Amazon and sent out by then, and even before all the big companies emerged to buy up all surplus books and put them out at a pittance rendering us unable to sell anything except the expensive or unusual. In 2004/5 tax year I sold over 4k of books on Amazon. I can fit my sales for a whole year on half a sheet of A4 now, I'm sick of the stupid rules, being told I need permission to sell a second hand book, being forced to give refunds to unreasonable customers, seeing Amazon earn almost as much as I do from each sale, and waiting unfair amounts of time to get paid because I wouldn't give in and get my postage from Amazon as well, not to mention the lack of help from seller support who generally don't appear to even understand the question or issue in the first place and then simply point you to a "policy" and more gobbledegook. Also I object to the way Amazon treats the small independent sellers who won't go big and use FBA, their own staff, and to the obscene wealth of Bezos who will not get one more penny from me.
To the fellow sufferers who have commented helpfully on my occasional posts, thank you, and I wish you patience and strength if you are going to continue, but I've had enough. Time comes a lot more of you may well vote with your feet, Bezos isn't Musk but he's rich enough to be a problem anyway.
I won't stick around to read the replies if any, I've been waiting to actually delete my account and that time is now. Hooray!