Test Australian Marketplace Web App

I’m preparing to launch a new marketplace-style web application and need a small group of Australian-based freelancers to run through it end-to-end and tell me what works, what doesn’t, and where it can be better... (Budget: $15 - $25 AUD, Jobs: Payment Processing, PHP, Testing / QA, Usability Testing, User Experience Research, User Interface / IA, User Research, Web Application, Web Development, Website Testing)