For sale is a 2007 Honda Civic GX. The car runs and drives, but not very well, due to a misfire. When running normally, it would get approximately 32 miles per gallon. One or more cylinders have low compression. I had a mechanic perform a leak-down test, which revealed that the car either needs a valve job or a new head gasket. I was quoted about $2k to have it repaired by a shop, or less if you can do it yourself.