2011 Yaris with 230k Miles---Smart Purchase?

[Pixydish]

I am thinking of buying a 2011 Yaris 4 dr hatchback 5 speed with 230k miles on it for $4600. It looks great, and it drove smoothly enough during my test drive. I'm nervous, though, about buying a car with such high mileage. The owner is the 2nd owner, and he has had the car for the last 120k miles---he has been using it as a courier and says it has never let him down once. He claims to have performed regular maintenance on it religiously as he has depended on the car for his income.

I see on various Toyota/Yaris forums that several owners of Yarii are still driving their Yarii with more than 300k or 400k miles, and they say their cars are still going strong.

My question is, has anyone heard of a 2011 Yaris with such high mileage still going strong? I see '07 owners with this comment a lot, but no 2011 owners. Is it possible the '11 model is not as great as the '07 model? I am a poor teacher, and I cannot afford to buy another lemon (the '02 Corolla is killing me, and I am def feeling burned and foolish for purchasing a car that burns so much oil---a qt and a 1/2 every 300 miles).

Any 2011 Yaris owners out there with high mileage? I'd appreciate any feedback you might provide. Thanks!