By pure fluke I spotted one on Trade me that took my fancy. Being on the taller side I needed to make sure that the length was long enough (which this one was) and that it laced up the back to make the fit was a bit more flexible. The dress was $500 (right in my price range) and had an original RRP of $2500. I thought I could easily sell it again after my wedding as well and get some of the investment back.
The dress was out of town so my mum went and saw it, she phoned me to let me know its condition and bought it on the spot. It needed a dry-clean but other than that was perfect. A few weeks later I tried it on and it fit like a glove so I got it dry cleaned (for $100) and it was ready for the big day.