If I had 1 million in hand-
I am willing to bet the dealership could get me in and out pretty quickly!
Likewise, I have a friend selling a house. I am quite certain we can make a bill of sale in an hour.
But- since those options are off-limits. Honestly- there really aren't many options.
Since, its cash-in-hand, that likely means online transactions are against the rules.
SO- the best course of action would be to visit a store with a lot of expensive goodies. In my case, walmart is the best local option. Suppose I could buy out all of the TVs, game systems, etc. At least those would have the best resale value.