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Have a client looking for someone to write an extension for magento that will operate a reverse auction or dutch auction
that gives him the ability to set the time ( length of auction ) in days or hours etc and then set the increment of the auction
i.e 3 day auction price starts at $25 reduces by $0.5c per hour.
Must be tested and usable in magento install, will provide hosting and subversion accounts for you to work with.