Private dealership agreement with Tesla?

There is a dealer in my state that sells a ton of Teslas used and I talked to a salesman there who told me they get their Teslas directly from Tesla. He stated they have an agreement with them, maybe their fleet vehicles? I was wondering if anyone is familiar with this. Their prices are pretty good and I am wondering if this "agreement" they have with Tesla is a good deal or a red flag and these are vehicles Tesla wants to get rid of.