Various news reports like this one in the Wall Street Journal said that eBay suffered a "search glitch" over the weekend. Apparently, a problem Saturday morning meant that users couldn't search out products on US and on some international web sites. The problem was fixed by Sunday morning.
The WSJ quoted an eBay spokesperson as saying that the problem "resulted from a surge in live listings as sellers ramp up for the holiday season."
eBay said that it has more than 200 million listings, some 33% greater than last year at this time.
The company also said it plans to compensate sellers for the problem.