I’m confused too, so you’re not alone. I keep debating buying my Tesla from USBank.
I bought my car from US Bank. In truth, I do not recommend that action, on a financial basis. I found comparable cars selling for less in the Tesla used car inventory. (The number of cars in the inventory seemed to increase as year-end approached, maybe from Model 3 buyers trading in? Or people upgrading to newer Model S before year-end?) Plus, I could have bought a new car and gotten $7500 from the Feds.
But -- I got a car I know and like, which I believe to be in very good condition, and which has been very reliable. Big factors for me were that the car has options no longer available -- sunroof and gray upholstery, both of which I would miss if I bought a new Model 3, say.
A word of caution -- US Bank was slow to process the paperwork and made a mistake on my sales tax. It all worked out eventually, but it was frustratingly slow and I had to call them several times to get everything correct. Patience is helpful! Allow at lest 2 weeks to get the title after you send them your money. Also, buying a leased car is apparently not too common, so even the Registry of Motor Vehicle clerk had to consult with someone about the requirements. Checking on the rules in advance might be helpful. (In my case, I was told the bank should have collected sales tax as well as the registration fee and title fee, and then sent me a check for the whole amount. Bizarre process!)