I'd say go for it since you already have Graham on your roster. Marshal is a step up from Meachem and Ridley/Bradshaw could go either way but is most likely a wash at the end of the year. You don't need Gates and he is on the decline anyway so I'd say do it!
12 team auction (100$)
Foster $30, Charles $16, Tate 2$, Hillman 2$
Boldin 3$, Britt 5$ (drop), Gronk 9$
Tucker, K 1$,Tynes, K 1$
Jets D, 1$
Dwyer, D. Thomas
J. Nelson, Garcon, G. Tate