Mine came sealed, but the draw was not bad at all. I ordered mine a few weeks ago, so they might be out of the unsealed types. I'd check with JB just to make sure if those are the types you want.
I know you didn't ask, but the manuals work great. I have set of both kinds and prefer the manual to the auto. Don't get me wrong, the autos work like a charm too, but I like the manuals because they give you a bit more control and they are less prone to getting damaged from leaky carts.