I don't think Wells is worth giving up one of your top 3 receivers.
Thomas looks like he might be Denvers #1, so I would hold on to him.
Jones is the only WR on your team I'd consider trading for Wells and I'm guessing that there's a WR or 2 on the wire that would give you similar production. OTOH, I doubt someone would give up Wells for Jacoby Jones.
I'm not very high on Wells this year.
Football Outsiders wrote:
The Seahawks have a third-and-long defensive DVOA of -102.1%. Seriously, when Seattle knows you have to pass, you are completely terribly, violently screwed.