I'd get a used car inspection if you're at all concerned about the car. The $100 or $125 that costs is well worth the investment, considering how much you may spend on the car itself as well as on any repairs.
My mechanic did a very thorough inspection on a used car (Toyota), and then deducted the price of the inspection from the cost of the 2 or 3 repairs I asked him to do after I bought it. (I could do the others myself. Little things.)
Later when I was considering another used car (Honda), he warned me away from it, and only charged me half price for the inspection.