What will you be recording using the audio interface and how many inputs are you looking at?For a start, I think only the m-audio fast track fits your budget, you can get it at Sinamex.
Hi Dale, aside from the m-audio fast track already recommended, you may want to take a look at the Alesis MultiMix4USB at Sinamex. URL: http://www.alesis.com/multimix4usb
It costs $180 and fits within your mentioned budget of 150-200.
Edit: I took a look in the Buy/Sell section and would like to forward these deals to you: