Firstly, we are members like yourself so you are not talking to anyone from eBay here.
Cars are the one thing not protected by eBay's 30 day MBG, and they could never enforce the taking of any deposit.
Non sales happen , it's a pain I cannot disagree, but nothing to enforce a completion after purchase.
If you do wish to relist do so in a Classified format, most will agree the benefits outweigh listing in any other format on eBay.
Here's all you need to know about Selling with classified ads: https://www.ebay.co.uk/help/selling/listings/listing-tips/selling-classified-ads?id=4167&st=12&pos=1...
@fernlea01