Quantity   Component name
2 × TowerPro MG90S Metal Gear High Speed Micro Servo Modified for continous rotation. Ebay link: http://www.ebay.co.uk/itm/360732935586?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
1 × RaspberryPi model B The old 512 Mb 700MhZ type
1 × 2 Gb SD Card
3 × Li-Ion 18650 Cells Recovered from laptop batteries
10 × 623zz bearings Name says it all 4 mm wide x 3 mm id x 10 mm od
1 × 3A Ubec RC Ubec from ebay
1 × Logitech C110 Webcam Cheapest UVC compatible I have found at the time
20 × M3 screws (10 and 8 mm long) Don't remember exactly but probably more of them,
1 × Printed parts Check the letsmakerobots.com project page
1 × Paper Clips to link the tracks I bought a box of them ...
1 × Edimax wifi dongle based on RTL8188CUS