bcbeautiful
I don't believe there would be any difference if you opened an eBay store, but you might want to ask eBay to make sure as that could work for you despite having different items.
Store items are cheap to list, but you pay a high FVF, and there is a monthly charge for havng the store ($16.00 ?)
Your problem with the store option, will be driving buyers to the store because your items aren't in the normal searchable queue, so buyers won't find them unless they are listed as auction also, which makes it all moot for most sellers of low volume.
All that being said, if you can justify the $200.oo per annum minimum enrollment, it's probably worth doing a full fledged cost analysis, if only to figure out when the numbers will work in your favour, if at all....
With regard to counterfiets, the seller's history doesn't really gaurantee anything. Many a seller has ended up with counterfiet goods to resell due to less than adequate due diligence, often driven by eBay's efforts to push sellers to keep listing more stuff to retain their PS status. There are also several other schemes to defraud buyers which are based on a seller's account that has good ratings and a long history.
The real dirty part about all this is that you are still on the hook for the listing fees, are you not, or were they reversed ?