is there a way to tell if one or the other are bad or just hit or miss? and any idea why my clutch would be smoking

and i dont usually get parts off ebay that are new but are these any good do you know?
eBay Motors: 1995-99 ECLIPSE TURBO CLUTCH MASTER & SLAVE CYLINDER (item 150234950935 end time Apr-16-08 12:30:42 PDT)

A little more $
eBay Motors: Mitsubishi Eclipse Turbo clutch slave & master cylinder (item 310039271950 end time Apr-14-08 11:02:29 PDT)

and these are twice as much but maybe better?
eBay Motors: [1995-99] ECLIPSE TURBO CLUTCH MASTER & SLAVE CYLINDER (item 170209951502 end time Apr-18-08 18:56:57 PDT)