The only stuff I buy one there are items that I cannot but anywhere else (like on videogames) or if there is a buy it now with a good price.

When I sell on Ebay I have been setting the buy it now and starting bid price the same so if someone wants it they just pay the price and it's done.

I think the best thing Ebay could do is to make it harder to sign up and make people verify their info somehow to prevent people from signing up more than once.