I don't actually have them but doing this in a kind of "pay it forward" type of deal. I got a good deal on a tank and told the guy I would spread the word to others that might want them.
20lb C02 tank full with regulator (single guage I believe) $120.
PM me or post here and I will give you his number.
*edit* believe you will need to be in the NW since the tanks are full, however once you get the number perhaps you can work out a deal for empty tanks shipped but not completely sure as it is not my gig.