Used iPhone 4s vs Nexus 4

So I was able to get an order in for the Nexus 4 yesterday but the projected shipping time is 4-5 weeks. I was able to find a white iPhone 4s on craigslist for $280. So now I'm not sure what I want. It basically breaks down to:

~$330 vs. $280
4-5 weeks vs. Now
Warranty vs. No warranty
New vs. Used

I know both are great phones and both have great ecosystems which is important to me, but man is this decision tough. What would you do?