Need Some Trade Trade Advice!

So someone in my full point PPR league is interested in trading with me for Lynch. He’s hurting in the RB department big time.

My team: QB: Big Ben WR: M Thomas, Larry, Tate, Cole, Marshall and Boyd RB: M Gordon, Lewis, R Freeman, Lynch, Michel and Clement TE: Burton

His team: QB: Cousins WR: Diggs, Funchess, Godwin, Enunwa, J Gordon, Jeffery, Stills and Callaway RB: Miller, Yeldon, Bell and Murray TE: Gronk

Would it be crazy to try to offer Lynch and Burton for Gronk?

I’m happy with my team so I’m not going to force a trade but what type of value could I get for Lynch on a RB desperate team? Thanks!