So just because you claim it as a "fact" supposedly makes it so?
I provided a RECENT example of a team (Pittsburgh) trading a solid D prospect in Joe Morrow and 5th round pick for a broken down, 'best days are behind him' soon to be UFA type player in Brendan Morrow.
Did Pittsburgh re-sign him in the following summer? No.
Why? Because despite what you might think, A GM of a SC Contending team doesn't sit there and create "what-if" scenarios in their head if for whatever reason he's somehow unable to re-sign said player in the offseason. They don't put the cart before the horse in a situation like this, they cross that bridge when they get to it. And they took a gamble with Morrow and they apparently didn't want him back....because that's the chance the buying team makes on every TDD. Sometimes it pays off, sometimes it doesn't. .
If a team out there feels that a Cody Franson is enough to bolster their blue-line to go deep in the playoffs and contend for the cup, it's not unreasonable to assume they would be willing to part with a low 1st round pick or a solid prospect and 2nd or 3rd round pick.
Also, you're not factoring in the possible bidding wars that could happen which would definitely inflate his value by a little.
So, yeah. That's my "fact".
Tell me again why yours is more grounded in truth?