Yeah. This is definitely a factor. There's also guys like Toews and Monahan out there, who will cost more on the cap (even at full retention), but likely undercut the market on acquisition cost. There are options out there for teams looking for a guy in that role.
The appeal with Laughton that would have to factor into any deal, is that he isn't just a rental. He'd be an investment in this season, but also an investment in a good player on a good contract for a few runs, not just one kick at the can. If Laughton gets moved, the price will be higher because of that...so it'd come down to a particular Team/GM being keen to spend a bit more in assets, to get a longer-lasting piece for their team. Not implausible, but it may be a tough sell optically...paying "more" for a lesser player like Laughton. Cost certainty is not always easy to convey to fans as "value", especially more casual ones.