Cave-Dweller

Hey, new here and new to the legacy. I've been made a very nice offer from a friend for his 2002 imported GT-B. He's has next to no faults apart from the brake lines had to get renewed over the last 6years. It's done 80,000miles and very clean. It does need a bit of bodywork doing but I'm a painter so that's not a fuss for me. For a first time buyer of an "older" legacy, what would be the key things I need to ask, check or parts that have been replaced etc. Any help appreciated. Cheers.