I haven't actually looked at kbb.com yet to see how much the things are worth but you should find out if anything has been replaced yet, when you say high mileage, how much is high. My transmission went out right near 100k miles, the engine went at about 131k miles. It runs fine now after nearly 2 grand for the transmission and 3 grand for the engine. Have they had either of these replaced as of yet. Ball joints are another thing. The were recalled last year, you need to find out if they have already had them replaced, if not, then you can use the recall when yours go out, because I guarantee they will. These blazers are tough on brake pads in the front and ball joints. I replace my pads annually with Bendix superior pads and Raybestos, both wear out in about a year. Ball joints every 30k to 50k miles. Is this a 4x4, if so, the actuator is a problem area. Does it have the 5 year (Pink) anti-freeze or the green stuff. If its pink, its probably never been changed, if it hasnt, thats a problem, that stuff sludges up within 3-5 years and causes all kinds of heater problems. Heater core or radiator may need to be replaced/flushed, be sure to run it down the road and feel the heat when engine reaches at least 160 deg. If your in MI, you need heat... Also, since your in MI, you need to ensure that it has been undercoated, if not, these chassis and other parts (4x4 actuator) rust out really bad. These are all things that I like many other people have dealt with. They do seem to be very common problems that so many people do complain about. The previous guy was right, usually only the ones with problems do complain. I have had all these same issues personally but still do like my 96 Blazer for the most part. you can msg me on yahoo if you want any more info from me. my screen name is Mulder_a51.