Used (Certified) Yaris: good deal?

[adamschneider]

I'm still trying to decide between buying an auto or a manual, but in the meantime, another possibility has opened up: a local dealer says he has a used '07 Yaris liftback coming in for about $11000.

He didn't have all the exact details, but here's what he was able to tell me: about 13K miles on it, extra airbags, stereo (and assumably the cold-weather package). Because it's Toyota-certified, the original bumper-to-bumper warranty would still be in effect for another 2 years or so, plus the powertrain warranty would be extended to 7 years/100K miles from the original purchase date -- longer, actually, than the original powertrain warranty.

What do you guys think? Is it worth saving $900 (and getting a few extras, like the airbags, that I wouldn't get otherwise), or should I go new?