Ertz - dynasty superflex trade

I’m thinking of trading for Ertz, I’m fairly stacked everywhere else. The Ertz owner is definitely out of the playoffs and is looking to rebuild. How much are you willing to trade away for Ertz in a dynasty superflex league?

Starting lineup : 1QB, 2RB, 3WR, 1TE, 1FLEX, 1SUPERFLEX, 1DST, 1K

My Team:

QB: Newton, Ryan, Flacco, RG3, McCoy
RB: Gordon, Hunt, White, Chris Thompson, Elijah McGuire, Buck Allen, Ware, Ekeler, Wilkins, Burkhead
WR: Adams, Hill, Thomas, Hilton, Reynolds
TE: Reed, Davis, Heuerman, RSJ, Smith
DST: Redskins, Colts
K: Bryant
IR: Delanie Walker, Kenneth Dixon
Picks:
2019 - mid 2nd (2), early 3rd (2), late 3rd (1)
2020 - 1st (1), 3rd (3), 4th (1)