Your clutch is worth $400. Haha, seriously though, no idea how much your clutch is worth. Someone, forget who, has been trying to sell a nismo twin plate for less than half price for about 4,5 months now. So you'll have to make it a good and I say GOOD price to get rid of it.
Anywho, why dont you call NPC or that Jim berry guy (people on here love him and his full monty clutch). Both of those will be able to tell you what you need.