Mark, welcome to the boards.
(I'm sorry about your unresolved situation. It's probably too late now to lodge a complaint with ReportCyber (previously ACORN), but I'll give you the link to a previous post of mine 
eBay talk the talk about fraud prevention; however, it is generally acknowledged that much of the vaunted fraud prevention is based upon users reporting suspicious instances, sellers, or buyers.
Even then, reports of listings and users that have red lights flashing and a voice shouting Warning! Warning! and seem to be readily perceived as fraudulent by human eyes may not be perceived or picked up by eBay's largely bot-driven systems.
So... your question "eBay what are you doing to stop this behaviour?" would be answered by eBay with their window dressing spiel (Keeping our members safe is a top priority for us, so we have zero tolerance for fraud on eBay. If y...). By the average eBay user posting on these boards, you'd be getting different answers... as you can tell from what has already been posted in this thread.
eBay have been known to ask for members to verify their identity. PayPal require ID. As digital*ghost has mentioned, eBay's Managed Payments (through Ayden) certainly requires that the seller prove their identity - to the point that some sellers have had a lot of trouble in doing so for completely legitimate reasons.
The flip side of that is that there are those who are chary about providing a lot of forms of identification online, based on their (I must admit, very understandable) concern that such documents (scanned) or document numbers could be obtained by actors with nefarious intent, where the upshot is that their ID is up for sale on the dark web. Data breaches are unfortunately not so uncommon as to make this an illegitimate fear.
Nevertheless, identification of people selling and buying does seem to be an inescapable necessity.
We should bear in mind that it's patently obvious that criminals have convincing fake ID to hand as required - or stolen ID from people who probably don't know that their identity has been stolen.
eBay does offer protection for buyers, however. When you read through eBay's Money Back Guarantee policy page
Paying by PayPal also offers additional protection. If, for instance, you fail to follow through with an eBay claim under its MBG (or try to open an eBay claim past the dispute time stated in the MBG policy page), you can still open a PayPal dispute. The timeframe is considerably longer.
In conclusion, eBay has many gaps in its fraud prevention. That's true. However, eBay provide buyers with considerable power to protect themselves in the event of a problem, as long as the buyer uses one of the payment methods listed in the MBG, acts within the timeframe, and follows through with the dispute (i.e., not closing it before there is a resolution, and escalating it within the required timeframe if the seller doesn't resolve the issue, and acting as required if there is an instruction within the dispute).
