Since anything at a regular retail store locally will tend
to cost more, and anything online tends to have a shipping
charge, the lowest cost might be from another yard sale, a
used one salvaged by a computer shop, or possibly a Goodwill
store if you have any locally.
If you're willing to use your credit card online (like
through Paypal) you might be able to find a good price on
one (though their shipping is horribly slow, usually takes
2-3 weeks or more to receive anything) at
http://www.dealextreme.com , although it might not be much
more expensive at one of the various online surplus
electronics sites.
