People need to stop making idiotic offers.
1. Nash is not overpaid, at least not significantly, maybe not at all. The problem is that a rumor spread on this forum among people who don't watch him that he's awful. One person wrote that he's "abysmal" defensively when in reality he's one of the top defensive forwards in the league.
2. If you make the Rangers pick up his salary so that his cap hit is equivalent to a second liner (around $6) or a third liner (Nash at half his salary), then you should pay through the nose for him since at this point he's underpaid, and at half the salary, he's severely underpaid.
3. Do not send your cap dumps in return for a retained Nash. There are offers out there where the Rangers pick up half of Nash's salary, and then the only return is a cap dump of a horrible third liner on a $4-5 salary, so basically the Rangers would have a higher cap hit (between what they retained and the cap dump they received), while downgrading from a star first liner to a below average third liner.
I understand that you may want to dump your overpaid garbage while receiving Nash with an underpaid cap hit after the Rangers retain. But unless you're willing to gut your farm system for that, there's no reason why the Rangers would ever do it. They're not going to pick up a third liner whose effective hit is $8.5 million between his salary and what they retain for Nash.
Gaborik unretained on a $7.5 salary in the middle of a horrible year, was terrible defensively, was having lifelong history of long-term injuries brought back a 25-year-old second liner, a 25-year-old fourth liner and a 21-year-old top-6 defenseman. At a minimum, unretained Nash brings in the same as Gaborik, but really Nash should bring more due to his advantage in 1) size; 2) health; 3) defense.