420 SEL

Not much gas mileage.

Be sure the engine's timing chain isn't too old - over 120K miles. Chains stretch and eventually break - the pistons hit the then unsynchronized valves, bend and break them, the valve guides and the cam. A big expensive mess, cost to fix is about what you will pay for a cheap 420SEL, so change the chains when you find the right car and it will be fine for a long time.