I bought my 1998 Tahoe in 2006 with 99,000 miles on it. I think the GM/Chevys of the 1990s are great looking vehicles and always wanted one. Being that I bought it with 99,000 miles, there were some repairs to be done at 100,000, one being the water pump. I recently had work done on the brakes. Gas mileage can actually be quite good. I'm a fairly "soft" driver, and have gotten nearly 23mpg hwy with cruise control. I was in Montana when I first bought it, and often got 16-17mpg "city", though that has plunged since moving to a big city with lots of wasted gas at intersections.
Comfortable seats, good sound system, plush suspension, great looking vehicle. Auto 4WD was great when driving on snow-packed city streets in Montana.