Quoting: littlejerryseinfeld
I mean, only playoff teams are going to trade for him, so every 1st will be late. and you are getting a prospect. He was barely eligible for the 2019 draft, i think hes like a week older than jack quinn.
i dont think you will do better than this.
I agree that only playoff teams will seriously consider him, however Detroit has enough risky and unproven prospect/NHL players. Ras just left that club, Veleno and Zadina are there now. Robertson would get thrown into that group. You don't think Detroit will get a better offer because you are solely looking at it through Toronto's perspective, while not considering Detroit's or the other 30 teams.
Teams that could potentially have some interest in Bertuzzi as an upgrade at 1 or 2 LW (NOT SAYING ALL THESE TEAMS WANT HIM):
EAST: New Jersey, Carolina, NYI, Boston, Toronto, Tampa, Pittsburgh, Washington, Florida,
WEST: Dallas, Winnipeg, Colorado, Vegas, Seattle, LA, Nashville, Edmonton, Minnesota, Calgary, St. Louis
Most teams will view him as a rental, a few will look at him as a re-sign candidate (value determined by when he gets back vs how he performs). That in turn will add or reduce value to each team. The Pens and Capitals are a great example. Injury issues, slow starts, however the age of their core group is "WIN NOW." They cannot jump ship and decide to tear it all down while having Crosby, Malkin, Letang, Ovechkin, Oshie, etc. Adding Bertuzzi helps them stay the course. They are more likely to "overpay" for a chance to win Lord Stanley.
Other teams like Toronto don't "need" Bertuzzi and therefore will try and underpay. They won't risk the upgrade at the cost of pieces detrimental to their main goal.