I recently bought an 06 corolla with 100k for 7000, and I did quite a bit of price comparison in the months leading up to the purchase... Mine had 100k miles and I paid 7k... It was a one owner, immaculate, every service record, sport package (which is laughable on that car, but just so we are comparing apples to apples)... One variable is your location... I'm in the Atlantic, southeast area and those cars aren't in super high demand around here... If you are in this region I'd say you could get it for closer to 5000 maybe, but 5900 prob isn't a bad price esp if it's a one owner and well cared for.
Btw, I love the car, I was driving a 99 and it feels like a space-age luxury ride in comparison. Solid car, you'll love it, as with any toyota. : )