Stores don't seem that good to me
The main killer is the auctions not showing up in a search. I can't understand why I would want to pay a monthly fee and higher final value fees just so I can be hidden from searches and list for 30 days at a fraction of the cost.
I list all my items BIN for 10 days, and most sell within that time, the odd one slips though and then is snapped up as soon as I relist (most people seem to view my items by newly listed)