Script Summary: Deletes most duplicate results on ebay.com. Won't delete near matches, only exact duplicates, so sellers who change a character or two in each duplicate posting won't get filtered out.
Okay, I didn't really write this script. I just took this guy's script and made some very minor tweaks so it will work on ebay.com
All credit to original author.
The script doesn't block content - in other words the data still downloads, so it won't speed page loading. After the page is downloaded it filters out the dupes. So if you are getting loads of dupes I suggest you turn this on and set your items per page to 200, because you will end up with a lot less after it rips out the dupes.