Just had another sale yesterday and I asked the Buyer how they found my store, they told me 'Google product search' - so I googled the exact item the way I had it listed and YES - it was on Google's first page! (referring to Google in N. America)
So i surmise that it is very important to list a good full description of item BUT ALSO use the same description in the listing body.
Ex: Uncanny X-Men #266 1st gambit
and here is the Google result...
http://www.google.com/#hl=en&source=...5a8571dfd650b1
My Ebid store shows up (US Google) as a Shopping Result.
another trick that might work - I do it all the time -
before listing an item, GOOGLE IT and see what key terms comes up for that item. Then, use those popular key terms in your listing.
It may or may not work but I do that a lot.
Blogging about your items helps as well!
GL to all :-)