I bought mine sight unseen. Once I settled on manufacturer and model I emailed all the dealerships within a days drive and asked for their lowest out the door price. Only 2 responded with a number and not a bunch of salesman b.s. Compared the build sheets of the 2 and tried to squeeze some extras out of the cheaper,more equipped one (didn't happen)and got in touch with the credit union. Most of my paperwork was done before I drove to the dealership and we finished the rest after the PDI. Pretty smooth transaction. Don't know how to mix in the power of attorney thing in there but like most things its probably a lot easier than it seems