This was mine when I was a kid. 

Front tires are missing. There is a small break on the rear plastic bumper (see 5th pic). The chassis need to be adjusted to fit tightly in tank. Currently it comes out when you lift the tank. The chassis engine runs good but when I test it on a track it only moves a little bit. The wheels spin but it just doesn't move well. It may be because there are no front tires but I'm not sure.