Yeah, eBay really is atrocious for cards of lesser value (commons, uncommons, non-holo rares); I think there's a $1 minimum price on Buy it Now listings.
T&T is good for non-holo rares and holos, but professor-oak does have the 25 for $5 deal for which a lot of commons and uncommons are eligible. For anything that costs more than $0.50 on professor-oak, T&T and GamingETC are generally better options IMO.
If you're impatient T&T and GamingETC are also not bad for chase cards, but you can usually snag better deals on eBay auctions if you're willing to wait for them. Somebody brought up Darkrai-EX, but I personally don't think the prices on the hottest new chase cards that everyone is rushing to get for their decks, like Darkrai-EX or Mewtwo-EX a couple of months ago, should be indicative of T&T's prices in general. Darkrai-EX is selling for nearly that much on eBay right now too because Dark Explorers hasn't been officially released yet.