Bailey and Beauvillier have no value as of today. If they had, they'd been moved by now, especially after the Kadri thing. Any deal involving them that also makes the Islanders better is wishful thinking and only that.
Of course they can be moved but it will not be in a deal like that. Currently, there are 10 or so teams over the cap and none under so there will have be be some serious dollars moving as the season nears. That means bottom feeders can probably get paid to take on players of similar stature, or get them for free on waivers, so no interest in the likes of Bailey.
I suppose Beau can be moved but it will only be for a player in a similar situation, ie. someone with potential but has never quite lived up to it and is on a multi year deal as well. It'll be a "change of scenery" trade more than anything, and ideally the Islanders want to get out of multi year deals for underperforming players.
Now that Kadri is off the market, Islanders actually have a little cap space to play with and use to their advantage. Maybe they can get a good player off a cap ceiling team at a cut price, or even pick somebody off on waivers?
With the Isles badly needing offense up front, you don't trade anyone until you actually know you are going to return something that fits the team and makes it better.
Just moving out contracts, in order to do so, is what a rebuilding or tanking team does.
While there might have been rumors about Kadri going to the Isles, there was nothing concrete beyond "educated" gueses. We have no idea how close he was or wasn't to signing with the Isles.
Until someone signs, trading Beau or even Bailey would be stupid.
If the Isles are dumpster diving for waiver claims, it should only be for depth or players to stash in the AHL. Anything beyond that is probably a fools errand and unlikely to move the needle.
We will have to agree to disagree on the value of Beau. If Lambert opens up the offense even a little, Beau has a chance to bounce back and be a very productive player.
Now would I move him in the right deal? Of course, I would be willing to trade anyone in the right deal.
I still remember when people were constantly complaining about the Isles being in cap hell and now that isn't necessarily a material issue and, absent a foolish signing, should improve every year.