Scotty, what do you think of 2006 Subaru Tibeca with rebuilt engine 175K. I have all the documentation from the previous owner. I had a blown headgasket, and rebuilt engine was put in. It runs great, does not burn any oil. No apparent problems. Is it worth keeping?

depends on how well the guy rebuilt the engine. Boxer engines all have limited life spans, lots of power, but they pay for that in shorter life spans.