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The over-the-counter version of the ReliefBand (there's also a stronger prescription version) runs from $80 to $130 at most retailers, though I've found it for $75 at two places (AeroMedix and MyPilotStore.com) and on sale for $60 at Anglers Center.
Even $130 plus batteries, which run for approximately 150 hours, will come out cheaper over time than the phenergan or Dramamine I've used in the past and it seems like a pittance for freedom from the nausea that's plagued me as long as I've had chronic sinusitis.