including Alzner (even with salary retention) and Juulsen (sorry but that guy doesn't have much value due to his injury record) decrease Petry's trade value so that's a no.

Colorado would like the deal more if Alzner wasn't included. Doubt if Oilers are going to risk a lottery pick for Tatar. These rentals (yea Tatar has 1.5 years left) almost always are traded to true contenders where the first round is in mid to 20s to 30s.
It's like the so many Rangers have Kreider been traded to Oilers in 80% of their posts. Wishful thinking

"Colorado accepts.. for two seconds instead of a 1st. Cuz they take Alzner half salary. needs change of scenery.."

This makes no sense.

Alzner @ 50% = still has no value, its actually negative value. If he cost 700K like Kovalchuk then maybe someone would give him a chance but 1 penny more is too much and definitely not for 3 years.

If Tatar is only a rental it’s not worth giving up a 1st if your edm since they aren’t in a position to win or even contend really