eBay recently began including listings in sellers' stores in the results from a buyer's search. Now you get both auction and "for sale" items presented in the result unless you specifically indicate you want auction items only. This is eBay continuing it's efforts to compete with Amazon and other on line sites.

For collectors, I much prefer the auction style. A lister can always put a "Buy it Now" option in his auction listing so it's a Buy It Now listing unless there is a bid before the expiration date.