Dobbins trade value

Was offered Waddle and Carter.
I’m a waddle believer, but am so on the fence for Carter. Team is middle of the road, but Carter would be my 2B/3 behind Sermon (just really bad luck with cuts/retirements) if I moved dobbins. Beyond stacked at WR.

I guess kinda 2 part question. 1 is that enough return, 2 what is carter’s throw in value? I would likely flip him with a WR to re-up at RB.