Sellers/buyers are not allowed to exchange contact info before sale end, so no viewing allowed.
If it is business seller, their contact info is on all listings.
If collection item, then you go & inspect, if happy pay cash & go home, if you don't take item, seller sends you cancellation request.
If listing includes postage, then you are covered by MBG, open ebay case & seller provides returns label for you to send back for full refund.
