If you are looking for a refresh of your stock manual 240SX components, or want to do a 5-speed conversion from automatic, this will be most of what you need to complete the swap. 
 
Sure, you can buy used, but the bracket is thin sheet metal (that may have metal fatigue from usage over the years), and the pedal arm itself has a plastic sleeve where the fulcrum pin goes that is not sold separately. 
 
Change this now, and never think about it again for 10+ years...
 
This set includes the following:
 
1x 46550-70F05
1x 46540-70F00
1x 46560-50A01
1x 46534-35F10
1x 46571-35F05
1x 08915-14000
1x 08911-34000
 
Not included with this are some of the smaller items, such as 1x 46123-H850A (clevis pin to clutch master cylinder), 1x 00923-10810 (pin for clevis pin), 1x 46532-89900 (rubber stopper), 1x 01121-06561 (bolt for bracket to firewall), 2x 08911-1082G (nut for clutch master cylinder to bracket), and a couple of other items. Listed the other part numbers for your convenience.