Buy The Wrist Parts
These are the major parts needed to build the wrist. You will still need to buy wood and glue.
Parts List:
1 Motor
1 large gear
1 small gear
1 wrist turntable
1 shaft
2 # 8-32 x 1-1/2 screws
6 # 8-32 machine nuts
2 drywall screws
Shipping Within The U.S.
The cost of the wrist parts is $41.99 + $5.80 S/H = Total $47.79
Shipping Outside The U.S.
The cost of the hand parts is $41.99 + $11.30 S/H = Total $53.29