When I was first brewing, my LHBS carried buld malt extract in 55gal drums. He had three varieties, I think. Plus, if you brought your own container, you got a little discount. However, this had problems since I think he used nitrogen to dispense and if he didn't turn over the product quick enough, it either got moldy or crystalized; I really don't remember. Is that what you were talking about?
I have three LHBS near me, but the one I like to go to in particular, (because the couple that owns it is super cool and super nice), has tons of canned malt extract and many varieties of DME. And on the odd chance they don't have it, they'll order it. The owner has also helped me in the past look at a recipe and help convert it from liquid extract to DME, (I've since become a DME fan).
So, my advice is to check out your LHBS if you have any near you and talk to them. Extract is a liquid and heavy and costs more $$$ to ship. I have found that buying kits online might save a couple of bucks here and there, but you'll have to pay shipping and that typically comes out to a few dollars more than what the same kit would cost at my LHBS.