Richards is not getting anything close to a long-term deal if he gets bought out. He will probably have to settle for a 2-3 year deal.
If Rangers lose this series without stealing more than a game, I could see Sather making even further changes in getting rid of Richards and Tortorella.
Rangers will have a lot of new contracts to be giving out over the next few years with Stepan, Hagelin, Callahan, Lundqvist, Girardi, Staal all needing new deals in the next few offseasons. The latter four will be big cap hit deals too. Wouldn't surprise me though if they didn't keep Staal after this deal is up. While he's been an important guy for them when he's in the lineup, they do have McDonagh and they'll probably bring McIlrath up soon here and I think they would avoid giving Staal a huge deal with some of his concussion issues and the fact he may end up going down to Carolina to play with his brothers.
To me Rangers might be a dark-horse to perhaps bring Zidlicky in on a one year deal to help out their PP if they can fit his money in.