Chick: 1,000,000,000,000,000,000 and a half currants plus a mint condition funpickle plus your first born child and maybe your soul if I'm feeling particularly hungry.
Helga: 37,000 currants.
Squiddy (I have two): 5,000 currants.
Sno Cone Vendor: 6,000 currants.
Dustbunny: 12,000 currants.
Deimaginator: 17,000 currants.
Cactus: 5,000 currants.
Oh and I'm quite willing to haggle if the prices seem unreasonable, in case the price guide thing I found was outdated and/or inaccurate.