Ebay to buy Shutl as it aims for one-hour delivery in UK
bbc.co.uk
bbc.co.uk
I don't think eBay can really outdo Amazon. The only thing that could happen is that Amazon could stop "killing it" allowing their service to degrade until it's at the level of everyone else. I always price compare when buying, and I usually end up going with Amazon. Usually because they are cheaper, but sometimes because of the convenience (long history, shipping speed) even when they aren't the cheapest option. eBay doesn't have that kinda hook. Also, every time I buy something on eBay there ends up being something wrong with it. Even these days.
With a guy selling out of his garage and a seller who says they didn't get the item, you don't know if the item was mailed (or even ever existed), and they'll probably kick up a stink if you make them eat the cost of items lost in the post.
Easier to have traders you can form trust relationships with, and who have deep enough pockets to provide a good return/refund experience.