Jeremy Roy has more trade value and Mirco Mueller had more trade value than Joakim Ryan or Tim Heed. Pedigree dictates trade value more than actual performance when the sample sizes are this small.
At absolute best, Roy might fetch a late first, more probably a second. Sooooo, If you want to trade Roy and someone like OReagan for a rental like Hanzal (went for a first and a decent prospect, similar trades happen every year), that really doesn't do a whole lot to make a big difference in our cup chances, go for it.
It's going to have to be Roy + a high pick or prospect for a mediocre piece that won't suddenly make us a serious contender. To get anyone that would is going to require finding a team interested in a package of Roy, a first, and a good roster player and I can't imagine there's too many teams or players to target where that would work.
Something like Roy + First + Donskoi for Panarin or a similar player. Not worth the cost of upgrading.
Unless it's for Tavares or a player of that caliber, there's no point.