Well now that Sony Vegas Pro 10 is out, Sony Vegas Pro 9 wouldn't be so costly. So try your local electronics store or camera store. I'm sure that somehow the prices for it dropped but none of the employees know why because Sony Vegas Pro 10 is very unknown at the time and it takes a long time for stores to start buying unpopular software.\
There is also Sony Vegas Studio which is not that expensive but still 100 times better than Windows Movie Maker.