approxtimate (n)

ap·prox·ti·mate
noun
/əˈpräkstəmət/

1. a very rough calculation or judgment of the value, number, quantity, or extent of something, so much so that its credibility it called into question
   "Redfin and Zillow varied so much in their approxtimates of the home's value that buyers and sellers routinely discarded both numbers when attempting to determine the value of a home."