How much would you give up for Antonio Brown?

.5 PPR 12 team league
QB Cam
RB- Zeke, Jordan Howard, Sony Michel, Ty Montgomery, D’Onta Foreman
WR- Keenan Allen, Doug Baldwin, John Brown, Sammy Watkins, Mike Williams
TE- Jordan Reed

Guy that owns AB needs a RB. Thought about offering Jordan Howard and Doug Baldwin. Should I try to give up Howard or Michel to get Brown and then risk having only two solid RBs?