I keep entering my vin number but CarGurus won't accept it. Why?

Try checking it against a vin decoder online to make sure the vin provides enough info and is accurate. http://www.vindecoder.net/

I checked the vin. It's correct but CarGurus still says incorrect.

I keep trying to list my 1978 Cadillac coupe Deville on your site for sale but every time I go to put the VIN number in, it comes back saying wrong number. I triple checked to make sure it’s the correct number and I quadruple checked to make sure it’s entered correctly. I tried it with spaces and without spaces. Please help.