shifter set (break + gear(7 and 3)):
(36.11) http://amazon.com/Shimano-ST-EF65-Shift-Brake-Black/dp/B00652QSXK/

rear and front derailleur:
(15.92) http://amazon.com/Shimano-FD-M412-Alivio-Front-Derailleur/dp/B001GSMR6U
+
(11.48) http://amazon.com/Shimano-RD-TX35-Tourney-Derailleur-Regular/dp/B003ZM9RLI/

freewheel+hub:
(12.83) http://amazon.com/Shimano-Tourney-7Spd-14-28T-Freewheel/dp/B003B8JYPU/
+
(52.04) http://amazon.com/Shimano-FH-M756L-Rear-Disc-6-bolt/dp/B0076CLJB4/ref=zg_bs_3494281_8

chain:
(17.17) http://amazon.com/Shimano-CN-HG50-8-Speed-Chain-Black/dp/B0013EP4W6

rim brake set:
(26.82) http://amazon.com/Tektro-C326-Caliper-Brake-Black/dp/B0041X5XR2

cranksets:
(24.20) http://amazon.com/Shimano-M131-Crankset-170mm-48/dp/B003ZMDJW6/

bottom bracket:
(14.79) http://amazon.com/Shimano-Square-Taper-Bottom-Bracket/dp/B0068FVOEM

handlebar tape:
(13.23) http://amazon.com/SRAM-Supercork-Bicycle-Bar-Tape/dp/B00142MD62

saddle:
(20.20) http://amazon.com/Sunlite-Cloud-9-Bicycle-Suspension-Tri-color/dp/B000H87PUI/

cabble:
(5.25) http://amazon.com/Bell-Bike-Fix-Cable-Set/dp/B002GCALOU