I do pretty well (£600+ a month) out of just buying items in auctions which are rather well hidden then selling them via the storefront/buy it now process.
Oh and "most current and in demand Disney film merchandise" (usually snagged from Disney stores and held onto for a bit) :)
Whatever the case, there is a large category of people for whom selling on consignment has always made a lot of sense, even if their margins are terrible. Their economic substitute to selling on consignment is throwing things away. Better to make a few bucks per item than none.
Secondary consignment markets have been really big on eBay for many years now. Makes sense that eBay would recognize the pattern, and attempt to own a piece of it. Meanwhile, big-time and category-specialized consignment sellers are still going to do just fine.