So I have Cooper Rush on my bench in one of my deep dynasty leagues. So what do I do?
I looked for the Dak Prescott owner, and offered him Rush for a 1st round pick next year. I don’t know if he’ll take it, but I love negotiating from the high ground!
I love making such moves in dynasty. I usually try selling lower-tier players for 2nd round picks, and then add those 2nds to players like Rush when reaching for a 1st.
Got the 2022 1.01 that way, that helped me drafting a valuable handcuff for Michael Carter… but that’s a different story. 
Rush is on the waiver wire in my SFLEX. The Dak owner isn’t always active there, so I’ll try and see if I can grab Rush for 10% of my FAAB budget. I won’t spend more, though, since he also has Carr and Tua, so he won’t be desparate.
Good luck with your trade negotiations!
If I have Carr I’m not offering a beer.
UPDATE: The other owner rejected the trade, which is ok by me. It’s a superflex league and I can always use an extra QB.