I got ripped off last year; similar to spuds. (Assorted excuse emails, then silence, then deregistered).
I agree about a lack of info from eBay; however I think it's sheer volume of users that stops a good monitoring system. Having said that, the money the system generates for eBay could surely fund a small department for investigating problems.
Like all walks of life, there are always going to be a minority of scumbags that spoil it for the majority, & eBay by its nature will, regrettably, attract scam artists.