Item	Source	Est. Price
Bicycle wheel.	Bike shop	$0.00
Chuck	Used	$0.00
Battery	Used	$0.00
Paint (for the wheel and chuck)	Used	$0.00
Wire (12, 14, or 16 gage are ok)	Used	$0.00
Glue for holding fin to strut and some other uses such as securing the audio connector as slip ring	Used	$0.00
Battery insulator as a spacer	Auto parts store (ask them)	$0.00
DC Motor as a generator (from a used treadmill often works well)	Craigslist	$20.00
Vinyl for blades	Tap Plastics	$3.15
Strut (aluminum u-channel works well)	Onlinemetals.com	$8.96
Flat aluminum as a fin	Surplus	$1.00
1/8" Audio plug/jack as a slip ring (for example)	Radio Shack	$4.19
Charge controller (to protect battery from over-voltage)	eBay	$8.90
Bolt (3/8" 24 threads per inch, stainless steel)	Hardware store	$1.99
Two washers for centering bolt	Hardware store	$.40
Flange bearing	Hardware store	$4.55
3/8" brass NPT nipple (short piece all threaded)	Hardware store	$2.69
3/8" brass NPT nut	Hardware store	$2.49
1 1/2" PVC endcap	Hardware store	$1.09
Bolts to mount generator to strut (stainless steel)	Hardware store	$1.16
	Total	$60.17
Optional:
Heat shrink tubing	Varies	Varies
Zip ties	Varies	Varies
Wire nuts for connecting wires	Varies	Varies
4" PVC as a cover/housing	Varies	Varies

Prices shown are based on real-world when possible, on 1/3/2013, not including tax


Same table without the pictures, for printing option: