Tight Ends on Dynasty Offseason Waivers

1 QB, Half PPR, 10 team league. Right now I have Engram, Fant and Irv Smith as my TEs. We just set up faab for the league and both Gronk and Hayden Hurst are on waivers. My team is built more to compete in the coming years so I’m thinking I should place a heavy bid on Hurst given that Atlanta paid a lot to get him from Baltimore (and he was drafted in the first round so the league must be high on him), and I’m not sure how long Gronk will be back in the league for. Anyway, I’m curious what the opinions are on how much I should bid for both of these guys!