depends a bit on how much work you want to put into them. B2 has a fine adventuring area, but the Keep base has to be fleshed out; the NPCs don't even have names! B4 Lost City needs to be reworked a lot... the layout is fine, but there is a LOT of nonsensical monster placement (particularly in the lower levels). Saltmarsh is rather like B2, in that the town isn't detailed much. N1 is ready to go as is. Horror on the Hill is a bit worse than B2; the adventuring area is fine, but the base fort the PCs are supposed to be using isn't detailed at all, not even a map (the one time I used it, I put it near the Keep on the Borderlands, and used both adventures as being in the same general area). Hommlet is pretty much complete and ready to run. Not familiar with the others...