Our car is dead

Well, it had to happen sometime. Our '91 Honda Prelude is dead. The timing chain has broken and bent a valve in the engine and is no longer cost effective to fix. What should we do? Well, we would love to buy the Prius, but since a car payment is not in our budget or our ideals, we will have to find a new/old car. We will sell this one for parts, to ensure most of it is recycled and salvaged. But in looking for a new/old car, we'd like to find one we could use biodiesel fuel with. Does anyone out there do this? We are just starting to research this option, any suggestions?