I think flyers would have to add for montour

So we swap Montour for a worse defenceman on a worse contract? How does that make sense for us?

I'd move Montour for NAK and your 2020 1st if its in the high 20s range

@RoyalBlueSabres
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@Skyraider112

Let's just compare a few stats
Gostisbehere had the highest ZS%, lowest +/-, lowest pts/min, among all Flyer defensemen.
Montour had the third highest ZS%, highest +/-, third best pts/min, among all Buffalo defensemen.
At this point Montour would most likely be the Flyers #1 RHD defenseman.
On the other hand Gostisbehere would be the Sabres #3 LHD defenseman.
In no way is this close to a one for one trade.
IMO the difference between a #1 RHD and #3 LHD is at least a 25th OA 1st round pick.
I may make this trade if that was the offer, but Montour for Gostisbehere is not even close to reality.

do the 1 for 1 with Miller then

While that exchange is closer, IMO the Flyers would need to add for Miller. (Did I mention I am really excited about Montour, his offensive is really solid and his defensive is above average)
As a result of very fortunate events, Buffalo had too many RHD.
First Murray of the Ducks let Botterill have Montour for the bargain price of a late 1st and what Murray must have thought was the second coming of Paul Coffey, Brenden Guhle.
Then in early June of last year McPhee gifts Botterill with Miller for a late 2nd.
Later in June, Bowman (not to be confused with Scotty) gives Botterill the greatest gift of all, Jokiharju for Alex (not even a shadow of Willie or Michael) Nylander.
Henri is a natural and has the instincts of a much more mature defenseman. I wish the talented Dahlin had his instincts.
So both Miller and Montour were splitting what ever playing time was available as the 3rd RHD, sometimes playing out of position as a LHD, or giving Rasmus or Henri a rest.
While this arrangement was good because it deflated Montour's stats during a contract year, it also deflated Miller's value.
IMO, the Flyers would need to add to get Miller as well. I may be inflating Colin's value but 2021 second seems to be about the correct value to add.
But, I may be wrong, maybe Ghost will become an offensive force again and his defense will pick up and maybe Miller will be a dud.
In the end, I do not think there is a deal here.

Miller has not gained any value from the time of his trade. He was traded for a 2nd and 5th. I'd actually argue he has lost a hair of value. Asking for a 2nd to be added with Ghost implies that you value Ghost as either a cap dump or valueless, which isn't really the case here. I think a similarly priced defenseman on the side they need is a fair ask. Ghost can bounce back to a much larger ceiling than Miller could.