About your 318 problem. Its a great car sure and realy feels sound but these cars came with tons of opts and hes probly pricing the car all wrong. I have a 91 318is and is fill to the hilt with every thing possible. I paid a little much when I got it but it was what I was looking for . Is the car you see the car you are looking for?Ask yourself this and ask the teen if this is a car they will respect for a long time. Cause a four door sounds good to you and to all parents but realy a 2 door is more sportier looking and with the price Ive see around You could get a nice car for 6,000 easy.As for the 6 an 4 cyl. No comment. I preferr the dual overhead cam 16valve My m42 has. It can be upgraded to run realy tight and clean.And be a real charmmer.Plus a airbag for those people who dont lookout. Safty #1