Saquon for Montgomery +?

10 team Half ppr league with 2 RB 3wr and 1 flex.
I offered Montgomery straight up for Saquon and got declined. However, he told me that if Saquon doesn’t show up this week, he accepts the trade

Should I add something else so I get it done this week?

My team:
Rbs: Aaron Jones, Monty, Hunt, Carter and Sermon
Wrs: Ceedee, Deontae, Corey Davis, Marvin Jones, Robby Anderson, Rhondalle Moore and Sammy Watkins

His team:
Rbs: Saquon, CEH, Mckissick, Edmonds and Singletary
WRs: Hopkins, Cooper, Sutton, Shepard, Parker, Reagor and Meyers

Atlanta is in the bottom 3rd of the league for rushing yards allowed and they played TB and Philly which are two teams not known for rushing. So if you want him, this is the time to do it. However, you are going to have a hard time since he does not have the RB depth.