The Astros just traded Carlos Lee (and are paying most of the remaining $9m on his contract) to the Marlins for 3B Matt Dominguez and LP Rob Rasmussen.
Dominguez (4th) and Rasmussen (7th according to BA) were both decently-rated prospects.
As I read that the Marlins may have interest in Liriano, I tried to come up with a deal I thought the Twins would do: LSP Brad Hand (from Chaska) and LRP Adam Conley, in my opinion was a good basis. (Both former Twins draftees.) Hand struggled in the majors last year (straight from AA) and is ho-hum in AAA this year. Conley was a 2nd round pick last year (and probably signed in August, so would have to a PTBNL).
Hand was BA's 8th prospect (coming into 2011) and Conley was 10th (coming into 2012). Now I'm beginning to think the Twins could get a little more than this for Frankie...