Things you do:
Buy Low, Sell High
Things you don't do:
Sell Low on a player an organization is otherwise extremely high on.
All you're going to get are lowball offers that only make sense for the team making the offer.
There's a misconception with prospects taken really high that if they aren't living up to their draft potential and are sold for less than what a typical vague top 3 or top 5 pick should be worth, they are being sold low.
The Oilers were constantly in a position where their fans claimed it would not make sense to "sell low" on Yakupov for a few years straight until they eventually did sell low on him and got a lot less than what he would have returned if they moved him earlier on. Turns out, they would have been selling high on him the entire time, they just were too attached to his draft position to realize it.
This is more a broad comment on the concept of selling low on a prospect picked high in the draft rather than me directly saying I think Bennett is a bust. If the Flames feel Bennett will live up to his potential or come close to it, they should keep him. But if there are question marks and they choose to move him for something that can help them out, just because he was picked high and his value was higher closer to be drafted doesn't mean they sold low....
...Man do I ever wish the Senators "sold low" on Jared Cowen back in 2014.