Is getting a 2005 subaru with over high mileage worth it?

That age Subaru is known for head gasket failure. It's also known for brake line rusting. Other than those two big items, it's a nice vehicle.

You can check the carfax and see if that work has already been done and done by a reputable shop. If not, I wouldn't buy it. Hope that helps! Jim

Too high in my opinion even if it is in good shape. I would pay a lot less or find a lower mile car. How long do you need it to last?

A 15yr old WRX has somewhere between negative and $10k value. That said, the 2005-2006 era motors had extremely high failure rates, so it's a complete crap shoot. Good luck. Buy only if you want an intensive, and perhaps pricey hobby.