i have been searching my local kijiji many times a day using just 'cage' under the pet section, and sometimes look through all the ads in the pet section just in case somebody doesn't use the word 'cage' in their ad. my search isn't narrowed down, trust me! lol. local craigslist is crud for anything pet related, usually just lost dog ads.
the exotic pet community here is pretty darn small. i don't even think there is a local ferret rescue, but you've sparked an idea - i'm going to lurk some ferret forums to see if there are any members in my city with cages for sale. driving 3 hours isn't an option for me, since i don't drive, and i don't think i'd be able to convince any friends or family to go that far for a cage, lol.
back to searching! hope i can find a deal as good as that one soon. i know Rhino doesn't know the difference, and his cage is adequate, but i have this itch to spoil him rotten that i just can't seem to scratch completely (as i'm sure y'all know too well!).