I'm looking to buy a used touring or cyclocross bike in New Zealand and sell it again before I fly back to the U.S. My other option is to buy a bike in the U.S. and fly with it, but thought I'd see if anyone is selling theirs or knows of a good place to buy used bikes. I would need something around 59 cm. It would be most convenient for me to buy one in Auckland or Wellington.
And is it easy to fly with a bike?
A quick tip: apart from bike shops (see yellowpages.co.nz) you can get a good idea about availability and price by browsing on trademe.co.nz.
I recommend using www.trademe.co.nz to buy and sell second hand bike, panniers, parts, tools, or just about anything else!