A lot of teams are at razor thin margins this year with Colorado being the middle and having less than 200k in space. So if a team wanted to add a couple players and have a third team use their cap space as an asset how much is it worth? A first? A second?
Lots of teams will likely end up using LTIR space.
Like Colorado. They only have $200k in cap space, but Erik Johnson will be put on LTIR and that will give them $6M in LTIR space to use.
Keep in mind as well $200k in space at the trade deadline means being able to add ~4x that amount in salary to still be compliant at the deadline.
Long story short, the values that have been well established from prior years will remain the same. ~$150k in real money retention is about a 5th round pick. $500k in real money retention is a 3rd round pick.
I dont think any expiring free agent contract this summer would come even close to $500k in real money retained(As a 3rd party) this year. Off the top of my head Sean Monahan might be the highest real money UFA contract this year at $6M. $4.5M of that will have been paid already by Montreal meaning $1.5M left. If a team retains 25% of that you're talking ~$375k which will be somewhere in between a 3rd and 4th round pick in value.