I wouldn't be at all surprised to see us trade Metcalf. He's going to want an extension next season, perhaps a market setting deal or he'll hold out. If we're not prepared to pay that kind of money, then it makes sense to trade him now.
I'd settle for a low first round pick and a starting quality player, preferably an offensive lineman, or a first and a third. There's already been a couple of WR trades, so the market may be dwindling. Jerry Jones has come under fire recently for sitting on his hands during the offseason, so maybe he's ripe for a deal. He claims that they're not going to be active before the trade deadline, but that could be just a smoke screen to hide his intent.
The Vikings and undefeated, have a ton of cap space, and might want to pair Metcalf with Justin Jefferson.