Here's an easy to build, inexpensive handheld gimbal suitable for most GoPro type action cameras. All parts can be purchased from your local hardware store and Ebay.
Parts List:
PVC Offset Coupling 1 1/4"
PVC Female Adapter 1 1/4"
PVC Unthreaded Meter Hub 1 1/4"
Small Length of ABS pipe 1 1/4"
Orange ABS Test Cap 1 1/4"
1/4" Nylon Bolts and Nuts X 4
8 AA Battery Holder
Small Push Button Switch
Servo Tester and Male to Male Servo Lead
Generic Brushless Gimbal (small modification required to flip main gimbal arm around)
Music by www.Bensound.com