It is best to try to find what your neighbors are selling them for. What cjs sell for in Michigan is not what they will sell for in Ia, Fl, Nv, Wo, or Cali, prices vary all over the lower 48 and remember "a car is only worth what some one is willing to pay for it" according to the bank and insurance companies. What ever you to agree too, DON'T TELL ANY ONE! it could come back to bite you.
Most people don't see the light till they feel the heat.