Dynasty: 2-5. Sell Antonio Brown for picks?

I am new to Dynasty this year and took over a money team that included Antonio Brown. I had been thinking 2017 might be the last chance to sell high on AB before his value starts to diminish with age and Big Ben starting to show his age.

I am 2-5. The top 6 teams make the playoffs and if the season ended today I’d be 11th or 12th, so on the outside looking in by a mile. Thinking now might be the time to move AB to a contender for 2018 picks or younger assets.

My team (full point PPR, TE bonus 1.5 PPR):

QB: Wentz
RB: Jordan Howard, Ingram, AP, Smallwood, Vereen, Alf, Jeremy Hill, Woodhead (IR)
WR: Antonio, Funchess, John Brown, Perriman, Marvin Jones, Ardarius Stewart, OBJ (IR)
TE: Tyler Higbee, Ryan Griffin, Ed Dickson, Tyler Eifert (IR)
K: Succop
DST: Vikings

Should I try and move Antonio Brown, or am I better off keeping him?
Is now the time to try and move him since it would take a miracle to make the playoffs?
If I do move him, what is reasonable to expect in return?