If you're eager and really (really) want to get out on a bike then talk the price down a little and you're good to go. HOWEVER, I know a lot of people are going to come in and say 'just save the extra $150 and get a kilo.' which isn't bad advice, but it depends on how bad you want a bike and what you're willing shell out.
When I got my first fixed gear bike, I bought a $200 no name conversion that I well overpaid for. It had crappy wheels, an old one piece crank and upgrading parts was a pain. But more importantly, it got me out on a bike and I was able to save up to build a project bike.
I think there's a lot of value to just getting out there on your bike instead of spending hours on the internet debating price, parts and other such things.