Trade away Conner in PPR keeper league for 3rd 2021 pick

I am pretty much done for the season (3-6) so I am looking for trades in a keeper league.

One of the top teams is offering me a 2021 3rd rounder (looking like a late 3rd) for James Conner who I could keep for a 8rd pick, and if I trade him away they can keep him for a 10rd pick.

Basically what I am asking if what are the chances the Steelers resign Conner, and what is his dynasty outlook? I am a little skeptical with Snell, Samuels & mostly McFarland and considering what became of Bell after he left

I already have two 1st rd and two 3rd round picks secured for 2021

Let me know what you guys think