Here are the parts I have bought from HobbyKing for my QuadCopter project:

Quad:

1 Carbon fiber frame (550mm Turnigy Talon Quadcopter)
4 engines and 4 accessory packs
4 propellers (2 left, 2 right)
4 brushless engine speed controllers
1 power distribution board (even it it only has a 60A plug in and 4x20A out, it should cope with the motors and 30A BESCs)
1 main control board (HobbyKing Multi-Rotor Control Board V3.0 (Atmega328 PA)) with mounting pad
battery (4000mAh 3S 40C Lipo) with battery strap
8 male (2 on each BESC) and 12 female (3 on each BESC) 3.5mm connectors
Yellow, red and black heat shrink tubing
1 XT60 plug to replace the 5.5mm plugs connecting the battery to the power distribution board

FPV-system:

On ground: FatShark AttitudeSD goggles and battery
On-board: Transmitter (5.8GHz included with the goggles), PAL videocamera and battery

Camera mount:

Fibreglass camera mount frame (tilt only) and a servo. Will be used for an Oregon Scientific ATC9K HD action camera and the FPV camera mentioned above.

Transmitter:
HobbyKing HK6S 2.4Ghz FHSS 6Ch Tx & Rx (Mode 2)

Other nice-to-have things:
Charger (and a T-to-XT60 cable to easily charge the main- and goggle battery)
glue
thread locker
propeller balancer
soldering helper
BESC programming card
main control board programmer (used to flash QuadControl V4.7 in X mode)