Here’s another rss feed to add to your favorite aggregator: Ebay2RSS. I couldn’t get the first option to work, but if you copy the search url from Ebay into the second part it will create an rss feed for the item you are searching for.
The url does get a bit long, but I was able to get it to work. Excellent if you use NewsGator or you frequently search for the same items. Enjoy.