As always, in a seller's market you'll have to pay a premium if you're trying to pry a player away from a team that wasn't shopping him, but if you were to be selling RBs to a team with extra WRs in need of RBs, I don't think you'd have to pay a top 15 WR price for Chark, McLaurin, or Sutton. But most importantly, if you were to do a startup right now, I would not expect to see those guys be taken in the top 15 of their position.I think those are about the prices you'd have to pay to acquire these guys right now. Top 15 sounds really high for the WRs, but take a look at the names in that range - Diggs, Thielen, Cooks, Hilton, Golladay, Lockett - I'd take Chark and Sutton over some of those guys. (I haven't done my homework yet on McLaurin.)
To answer my own question, I'd buy Godwin, Sutton, all 3 TEs, Jackson, and Jacobs at those prices.