Clayton is wrong. If Seattle wanted to trade Russ, they have ways to lower his dead cap hit.
I doubt a trade happens given that we are built to win now. However, if you do a bit of math, using the Khalil Mack trade as a baseline, the trade value for Russ would likely be three 1sts and two 2nds (present year value). You can then play around with this by assuming a quality starter is worth a 2nd, and an All-Pro, in their prime, is worth a 1st and a 2nd.
So far the most hilarious trade scenario, that I've seen, involves trading Russ to Miami for Tua, a 2022 1st round pick, the 3rd, 18th, 36th, and 50th picks. Then trading the 3rd pick and the 36th pick, to the Falcons, for the 4th pick and Matt Ryan. Presumably, from here, JS would then continue trading back until he's out of the first round entirely.