Do you stand by dealership

Cargurus does not spend time sending reps to check out every car, that is up to the buyer. You said you couldn't get a safety inspection? I wouldn't have bought the vehicle then. Here is Cargurus stance as posted in the terms of use. The information on vehicles provided through these services and on the Site is supplied by the seller or other third parties; CarGurus is not responsible for the accuracy of such information. CarGurus provides these services and the Site and all information and materials without conditions, representations or warranties of any kind, either expressed or implied. CarGurus is not a party to any transaction between vehicle buyers and sellers that occurs through the Site or that originates from information found on the Site. Prices do not include additional fees such as government fees and taxes, title and registration fees, licensing and plate fees, finance charges, dealer document preparation fees, and emission testing.

You bought a total rust bucket. Check with your states DMV office to see if dealers are required to sell cars that pass safety inspection.