This might be a touchy subject, since potentially one would be spending credits unknowingly, but there are ways around this I think.
It would be a great help if we could click on a card and see all auctions for that card, if any, instead of having to type up a card name in the search field. This will help if you're just looking for a particular card and want to buy everything in the market. A related feature would be tying this feature up with the wishlist, maybe even adding an auto-bid at a certain price feature (or even bid at a rounded off current market rate).
Sorry if this has been suggested before, I tried to search the forum and +voodoo +market came back with like 41 pages. So.. no. Thanks!