All Wheel Drive Subaru (Crystal Falls north of Florence)

All wheel drive Subaru Legacy Wagon.
The body is in amazing condition.
The interior is also very nice.
The air conditioning works great and so does the heat.
The power windows and locks all work as they should and so does the cruise control and tilt steering.
This has been my wife's car and has been very reliable.
It still runs and drives but it runs choppy until you get up to cruising speed.
Then it seems just fine.
I recently drove a thousand mile round trip with it the way it is.
But I wouldn't want my wife driving it the way it is.
It had the head gaskets and a bunch of stuff done to it around 55k miles ago.
(see receipt photo) so I don't think it's the head gaskets but I'm not a mechanic.
It is a 2000 model, it has 257k miles on it now so I bought her a newer car.
I think this car is a good buy at $1500 cash but I wouldn't keep driving it the way it is for very long without having it looked at if you can help it.
Possible trade for a 4wd utility ATV.