i am running my own website <snipped> currently, i just do the SEO by myself. the bidding online will make you money, but you have to familiar with your products and key word,make sure which is useful and competitive. if not, you will waste a lot of money in the bidding.
That is because ebay has huge charges imposed on the seller -- charges for listing items, charges for a photo gallery, 4% final value price, 4% taken by paypal for receiving money.
Now to to take care of these charges, the seller as to increase his price when selling at ebay, and hence the buyers will end up paying more for the items. (unless its a wholesale stock at lower price).
what benefits the buyer is when an auction site assures the seller getting more than his selling price after sale of the item. It is here that the seller will list an item at a lower price.
I know one site that does exactly that for the seller.