If he likes the car, he could try offering less. The seller is probably close to KBB value. A 2000, excellent condition, private party, Blue book is about $11,800. Dealer is about $13,500. So the asking price here is in between. I say, make an offer of about $10,000 - $11,000 if he likes the car, see what the dealer is willing to do. All the usual precautions apply; have it inspected by someone independent, and run a Carfax.