As a occasional buyer I would find it useful to be able to easily see what kind of feedback was left for a particular item previously; this would help me assess the quality and suitability of the item.
Why not include a direct link to feedback a seller has received for an identical item? I do mean IDENTICAL, not just similar.
If fact, why not include a link to feedback other sellers have received for the identical item? That would not only increase the likelihood of determining whether the item is what you want, it would also help you decide who to buy it from.
Obviously there are limitations due to sellers not using identical descriptions, keywords etc. and eBay take note: a bad version of this would be worse than no version at all!
Looking forward to my eBay credit for useful suggestions, har-har!