I think you will get the main thing to look for... condition of the body. Mechanicals can be replaced or repaired easily, but bodywork can take months and many $$$ to complete. If you find an unfinished project but with many pictures of its build/repair, that should be a safe bet. If they didn't take any or many pics, they did that for a reason. Its something that they don't want to remember! Interiors are a bonus if they are complete, but if bits are missing, alot of them can be obtained in the US. If you jump on any of the US Z forums, there is always someone there that can help. They helped me many times.