1. Laptop CPU suction fan salvaged from a spoilt acer laptop which didn't belong to me.
2. USB socket with wire, salvaged from a spoilt pair of speakers for which I got a full refund.
3. Some of the excess PTFE Teflon tape left over when I replaced an old leaking tap a year ago.
Total cost: $0
Wires twisted into place.
Soldering done to secure the wires.
PTFE Teflon tape added.
I placed this beneath my "Thai Girl HSDPA/3G/UMTS modem" (which usually runs very hot) and it felt really cool to the touch.
Priceless! There are some things in life that money can't buy - like free things. If you buy them with money, then they wouldn't be free anymore. :P