why is it that none of these appraisal websites are close to each other? The listing price is $8.9. I went to zillow and the FMV of the property was $6.9m, I went to dean's appraisal and it came up to be $3.1M. I went onto a realtor's website to get an appraisal and if came up as $2,000,000 - $2,500,000. what do I do?