Need help for trade values

Ok, I am in a 12-man full PPR league. We run really deep so the waiver wire is bare.

Start
1QB, 2RB, 3WR, 1TE, 2FLEX, 1DEF

Bench: 8 spots

My team is:

QB: Dak
WR: Godwin, Kupp, Gallup, Jones Jr, Woods, Beasley, Renfrow
RB: Carson, Montgomery, Sanders, Hines, Edmonds, Justice Hill, Ty Johnson, Armstead
TE: Hooper

I feel like I need to upgrade at RB, I was thinking about offering Godwin or Kupp with another smaller piece for a RB1. Who would you be looking to trade off this team to upgrade at RB?

Kupp for bell would be a good offer. Depends who has solid RBs that would need a wr. I like singletary once he’s back from the hamstring so he might be cheap to get as a RB2.