It all depends on your shopping/buying habits and preferences.
Personally, as a buyer, I infintely prefer fixed price/best offer listings to auctions, and 90% of my purchases on
ebay are made that way. I don't want to have to put a prospective purchase on hold just because I have other pending bids out there that (1) are as many as ten days away, (2) I don't know what I actually will be spending, and (3) I may not win anyway.
For every buyer out there that prefers auctions, there's one who prefer fixed-price shopping (probably more actually, or the balance of auctions to fixed price would not have shifted the way it has).