Based on reports here in ATL, the Hawks have no interest in moving Horford. They view him as a key piece in what they're doing right now. As others have posted recently, they're reportedly prepared to offer him a max in the offseason (5 years, $146 mil).
If ATL believes in Horford to the tune of $146 mil, given age and injury history, why would an offer of Sully and two mediocre firsts capture their attention? While I like Lowe, I think his trade-season speculative pieces are fueling quite a few unrealistic proposals around here.