97 Honda accord 73K new tires from dealer test drove found when you stopped at a lite the steering wheel vibrated enough you could actually see it not just feel it brakes not low but felt like pulsing?

Assuming that you are just checking into the vehicle and haven't bought it yet?

Many 4 cylinder vehicles vibrate a bit more at an idle, especially if the AC compressor is on, and the compressor is usually on when the defroster is working. Also, when an auto-transmission 4 cylinder vehicle is in gear, at a stoplight, it will tend to vibrate a little more than a 6 or 8cylinder. If all 4 cylinders are running properly, don't worry too much about an engine that's vibrating.

Brake pulsing on the other hand is an annoyance that should be repaired since it can affect the control of the brakes. Brake pulsing is caused by warped rotors. Usually the front rotors do most of the braking and can heat up when braking downhill for extended time or when stopping with a heavy load. If a rotor overheats it can warp, causing the pulsing. Just replace the front rotors and while the brakes are open, replace the pads.