$600 isn't even a set of tires these days. I think I have been heavily influenced by working for companies that are cheap, and run fleets of cars. The key is the lowest cost per mile, and the fleet managers don't even blink at spending money to replace a transmission or engine. Collision damage exceeding the value of the cars is just about the only thing that they won't spend money on.
The other thing I look at is how much the tax, and depreciation will be on a replacement car. A typical car today sells for at least $25,000, so that is $2,000 in tax and about $8,000 in value that vaporizes the minute I drive it off the lot. Never replaced an engine yet, but $2,000 for a new transmission that will go another 100,000 miles is alot less than $10,000
Yep, and I'm not going to replace my tires, battery, or engine on this car.
But I did just get new brakes.
I'm not a fleet manager. This is my personal car, and quite honestly- I'd like a fancy new one with heated seats and a USB port. But I'm too frugal to replace what is right now a perfectly okay car (which is one of the reasons I'm not broke. I don't buy new expensive things just because I 'want' them).
It took me 13 years to get 120,000 miles, so I am really not concerned with being able to extend it another 100,000.