A feature I often use on the big Eb** is the ability to search on Price and domestic postage.
I can't do it here, and I find that I don't look on Ebid for the cheapest product as much as I do elsewhere, because it takes so much time to trawl through adding price to P&P to see which is cheapest.
When Ebid items can undercut the cheapest items on Eb**, this seems like a missed opportunity to sell.