https://www.ebay.co.uk/itm/255221659808?ViewItem=&item=255221659808
The BIN price is now £3k. If the "1933" "penny" is still free, what is the money actually paying for?
Very tough question. At the moment the only way of doing the former seems to be to add the sellers' names to a maintained list of cheats like http://augustuscoins.com/ed/fakesellers.html
and http://www.lateromanbronzecoinforum.com/index.php?topic=1218.0
I suspect MB may be part of a group with a bunch of Ebay names and possibly different house addresses who shill bid each other up as required.