Can someone please explain to me why some Rangers fans think they should get Shatty at rental prices even if he comes extended?
If he comes extended, then you've got a player locked up for 6-8 years. That's not a rental. If the argument is, that he'd just sign with the Rangers anyway in a year as a UFA, that's assuming that he would 1. make it to UFA (he could easily be traded somewhere else and decide to re-sign with that team) and 2. If he does reach UFA, that he'd 100% sign with the Rangers. While I'm sure the Rangers are on his short list, it's far from a guarantee.
The price would be higher for an extended Shatty because it would negate a ton of risk for the Rangers - they'd absolutely have their guy and would have him locked up longterm. Not to mention you'd have him for helping your team this season...something that's not available with the "try to sign him as a UFA" option. For all of those reasons, an extended Shatty should absolutely cost more than a non-extended Shatty.
If Army was willing to trade Shatty as a rental, why even bother with the Rangers? They don't exactly have great assets that could help the Blues outside of Zibanejad and McDonaugh. They're just not great trade partners IMO. If Army was willing to trade Shatty as a rental he would've been traded by now. The reason why it's taking so long is because Army is trying to maximize value by trading Shatty to a team he'll sign an extension with.