Should I buy this Honda Si ?

You are smart. That is high: Highway Robbery...Look around for better deals. You might want to look at Toyota Corollas, Nissan Sentras, and other used cars from the Japanese market. Stay away from used Korean makes and American ones..Do your research and be careful when buying a car from a private owner. Remember to ask (MAIV)Mileage, Accidents, Insurance Rates, and overall value.