Mike Evans for TJ Yeldon

Someone is asking me for Mike Evans for TJ Yeldon. I am not a Fournette owner. Is this a fair deal?

His roster is
QB: Rivers
RB: Gurley, Mixon, Yeldon, Ekeler
WR: Stefan Diggs, Corey Davis, D. Thomas, Antonio Callaway, Christian Kirk
TE: OJ Howard, Cameron Brate

If not then what should I counter with?

Would you trade a WR1 for a mid RB2 that in a few weeks will be a matchup dependant flex?

What is your roster? As it stands I would not give Mike Evans away from Yeldon when Fournette is supposed to return after the Week 9 bye.