What is reasonable cost for stabilizing bar and correct odometer reading?

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I purchased for my college freshman son a 1993 toyota LXE for $1800. No car fax or warranty from a small private car lot. The mechanic says that the stabilizer bar needs repair and the rear brakes. The car suppossedly has 160,000 miles now I will have to find out if the odometer was turned back. The car runs well despite the repairs needed.