Advantages: There are no adantages to ebay anymore
Disadvantages: Unfair payment system, Ridiculous fees. Unfair feedback system
Ebay has made life so difficult for the small seller, that the average buyer is now stuck with the equivelant of the High Street on ebay.
Another difficulty for the buyer is that ebay don't allow sellers to offer the far supeior Google Checkout payment system
It is now becoming more apparent that ebay is no longer the place to buy your collectable books, 2nd hand toys, clothes and generally anything else that floats your boat.
They have messed around with their system to the extent it is no longer viable for home sellers to list there.
Fees and the additional fees of paypal being forced on its users (contrary to belief, not everyone uses or even likes papypal) has also forced sellers over to ebid.net, and now many of the buyers are following them over to ebid, and dumping paypal in favour of the easier to use (and cheaper for sellers) Google Checkout.
Ebay's unfair changes to their feedback system has been the last straw for many, who have now migrated over to ebid.
Mind you I said earlier 'forced people over to ebid'. It was more of a case of more people finding out about ebid's no listing fee policy and low (usually none) Final Value Fees.
Well now if you didn't know about ebid.net, you do now, and have no real excuse to hang around ebay any longer.
Summary: Ebay has shot itself in the foot
Join ebid.net here