I’d load up and drive the games for a sum of money (non refundable) worth my time and effort with expectation to turn the entire load around and drive it all back and unpack it.
If a deal is made when you get there (no haggling) then unload it all and get back home with even more money and a lighter load. Either way you are making money if the deal goes through or not.
One other thing and I know everyone has been saying it for years… The market is about to crash, not just on pinball machines but all things extra. I’d question myself, if I wanted to sit on things and deny money now vs sit on things that can’t be sold or have to be severely discounted later. The entire world economy is very shaky and US inflation is ridiculous.
Not to be doom and gloom, but nobody likes sitting on high value items they don’t care for when they have to take a loss to be rid of them. It’s a different story if you love your machines regardless of the market value of them.