ugh, can't stand it. If you don't know what I'm talking about, go to your my ebay and at the top right corner of the page there should be something that says "We're working to make My eBay easier to use. Try out the beta!"
I was on a search page and the options like completed auciots and buy-it-now were not there. Unless I couldn't find them. It was very inconvienient so I opted out of thier little experiment
Other Frank, it appears to be random. Sometimes I got it, sometimes not; but now I have opted out. I'm not exactly thrilled with it either.