It's a random discount . Pick an item and refresh the browser a few times and you might get lucky .
Omigosh, it just gets better and better! (lol)
It was random on that one item too. I saw it and thought great I’ll have a look at something better then went back to original item. The discount had then gone but after pressing F5 around 6 times the discount came back on ????
I do sympathise with the OP: Ooh, discount. Excellent. Ok, maybe just for one retailer. Oh, may not on all items from that retailer. Erm, what other items? ... was it just for that one item? *silence from eBay* At 5% on seemingly very hard to spot items, it's like a really really stingy tombola, and there is no way the OP could have anticipated that!