So, no, I wouldn't buy a reprint of material I already own and never played strictly as it was written anyway.
Not trying to single our Bullgrit, but I do want to reiterate I am not talking about reprint books with new art or some such thing. I am talking about an "AD&D 3rd Edition" that hews closer to "old school AD&D" than 3.0 did (which i think is still very much a natural successor to AD&D, moreso than 4E).
What would such a thing look like? No idea. Not "Skills and Powers" -- that was proto-d20/3E. Maybe some evolution of the proficiency system (skills) and perhaps a shuffling back in of half orcs, demons and assassins. Not sure.