My sister in-law offered to sell me her car for a fair price according to KBB. The car has 160k miles. She's kept up the maintenance, and had the suspension replaced. Other than that, there's been no other major repairs. My biggest concerns are the hybrid battery lasting; the catalytic converter/sensors; and that the car has resided in Las Vegas -- so maybe the heat and cold have prematurely worn the car? She says that she's never had any codes come up. To feel confident with this purchase, I can only think to take it to a Toyota dealer for a complete check-up. Does anyone have any advice on this purchase? Or, if there is a way to test the hybrid battery, and smog system for wear, etc, etc, etc. Any help is much appreciated.