This return is far too low and probably not the right approach. The above suggests a willingness to do a deal in the realm of fair. That can't be the approach here.
Treat Bedard like he's somewhere between Auston Matthews and David Pastrnak. A slamdunk 1st rounder even in one-year leagues (which is what he'll be by year 4 at the latest), perennial 50-goal/100-point threat. What are you asking for that sort of player in the leagues above? The moon. Maybe the world. Maybe it's not even a conversation you are willing to have and instead focus on what moves you can make to build around Bedard.
If your team is really weak, then focus on setting the table for 4 years from now when you should expect Bedard's massive 2nd deal to come in. McDavid will be a free agent that same summer and will set the upper limit on salaries but Matthews will have already signed a new deal likely blowing past McDavid's $12.5M AAV, far more than MacKinnon's new deal at $12.6M. Expect Bedard to come in around whatever Matthews signs for on his next deal and line up your salary cap accordingly.
I'd also still try to win while having Bedard on a cheap ELC, focusing on his 2nd year, which would give you time to build a competitive squad in the short term but also time to fix your cap in time for that 4th year spike in salary.
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If you are determined to find a trade because you don't like the salary story above then any reasonable starting point should include an established (and under-27) Top-10 or so player in your league. McDavid, Draisaitl, Matthews, MacKinnon, Makar, Pastrnak, Rantanen, J Hughes, Kaprizov and then build out sweeteners going one way or the other from there. But the expectation is Bedard comes in somewhere on their level.
Don't have a young top-10 guy to offer? Then your ticket to ride becomes 3 (under-27) top-50 guys like Svechnikov, Meier, Hischier, Zegras, Q Hughes, etc. and then build out sweeteners from there.