Especially with retention to a budget team.
Duration of time from the trade deadline to the end of the regular season is a period of 40 days (2/26 to 4/7) Rick Nash makes $8.2M this year, and there are 185 days in the NHL season this year, therefore each day of the season he earns $44,324.32. If traded at the trade deadline, the acquiring team would only have to pay out 40 days of salary, which is $1,772,972.80, and then they get him for a playoff run. Not to mention that that team would be solidifying themselves as a playoff contender, that has some big effects on your audience/market/ticket sales.
Tell me that a contending budget team like Anaheim, Ottawa, or Nashville, or even a salary cap-strapped team like Chicago wouldn't lunge at the chance of getting Rick Nash for a playoff run while spending a mere $1.8M in actual salary while only surrendering futures?