Not entirely sure I understand the problem here
As one piece of tat is more or less the same as another, just differently shaped, does it really matter what gets delivered to which person?
Just be grateful for the surprises you receive. Think about it. You've bought some piece of shite, say a piece of toast with moldy butter resembling Jesus, but instead of that, six months later you receive an xbox 360.
Same difference, a worthless piece of tat. But.. you have the pleasure of being surprised by the worthless piece of tat you received.
Not only that, but presumably you will continue to receive random pieces of tat forever (which ironically is roughly the length of time eBay takes to resolve a customer's complaint).
I would think this would be great selling point for eBay. Sort like the ultimate pyramid scheme. Everybody contributes an item to the scheme, and eventually everyone will receive something. The lucky ones get cubic zirconia in gold-coloured jewelry, the unlucky all sorts of possessed cuddly toys and turds resembling various characters from our favourite religions.
The only issues that I can see are whether your dustbin is large enough to store the items you receive from eBay, and how reliable your garbage collection service is.