Good for items where there is lots of stuff put your item in i.e. "front paddock stand" then there is a drop down box (sort by) click on "price + P&P lowest" then it sorts them out into order, that came on up on a UK search.
All the search functions on ebay are quite useful, such as "time newly listed" if you dont want to search the x amount of pages you searched the day before, distance nearest first is good too for say buying a bike as it shows those nearest you, simple as that
I could go on with an ebay masterclass.
Last one, instead of searching "superduke" and then "super duke" search using (superduke, super duke) then it brings up both you can even do (superduke, super duke, KTM 990) and it brings back all three, has to be in brackets and commas.