Andrew Appel, a Princeton computer science professor, purchased a lot of 5 Sequoia AVC Advantage voting machines for $82 or $16.40 each (plus shipping) You can read his experiences with these impressive monuments to government stupidity here:
http://www.cs.princeton.edu/~appel/avc/
"I purchased one lot of 5 machines, for a price of $82 for the lot. Registering to bid at govdeals.com is just like registering to bid on e-bay--no questions asked except name, address, e-mail, and telephone number. The government had no information about me or my motives in obtaining the voting machines at any time before or after the auction and delivery of the voting machines to me. I paid for the machines by cashier's check. I had these machines shipped to me in Princeton by commercial carrier, where they arrived on February 2, 2007.

On February 3, 2007 I examined the machines. The machines arrived in operating order. The machines, originally sold to Buncombe County in 1997 for $5200 each, appear to be almost identical to machines used in Mercer County, New Jersey, where I vote. The only difference that I discerned is that instead of a green "x" to indicate a vote, there is a green arrow. This difference is very minor and does not, for example, mean that the internal software is different. "

(Source: http://www.cs.princeton.edu/~appel/avc/ )

"...I watched a Princeton University student pick the lock of my machine in about 7 seconds..."