Just in case this guy was serious:

1) What makes you think DC is cheaper if nobody offers it for sale?
2) Don't blame the people you spoke to on the phone for not knowing
about DC--odds are you were the first person to make this request in
the last 90 years--if ever.
3) I used to work in a NY office building with DC; since that wouldn't
run air-conditioning, they gave us salt tablets. My college dorm was
DC, too, and we had to buy converters to run our stereo and
refrigerator--with the amount of electronics in today's dorms, we
would have been driven crazy.