I am interested in buying a used 2002 Trailblazer. It's the LS model, two wheel drive, 4.2L six cyl, etc. Looks good, 45,000 miles on the odometer. They want $12,000 for it. Is that a good deal or not? I live in Savanah, Georgia if that makes any difference or not. I am looking for some type of vehicle that is big, roomy, safe in an accident, but also one that gets dceent gas mileage. (like clost to 20 mpg). Any help would be greatly appreciated. Thanks.