[1crosscut]

Go to the DMV and be straight up about what is going on. If it can be worked out you will have a car you like and will have no worries going forward.
If it turns out you will need to jump through a bunch of hoops to make it work then you will need to decide if that is worth it for the price you negotiated. If not you can negotiate a lower price and go for it or walk away.
There are lots of A's out there.