Moss is currently 267/344/580 w/22 HRS for the Cardinals in only 281 ABs and has a solid power/on-base projection for 2016. He is 32 y/o, so has many solid seasons left.
I'd be looking to either upgrade a low draft pick to a 1st rounder or to acquire a very good prospect or younger player who would be useful next season. SP, OF, C are most needed, but other positions may work as well.