Thanks @yoda one for me - this was really helpful, as I've had the exact same question (moving form UK>US this summer). Interesting to see all the less-than-helpful responses to your original questions above.
Can you please confirm which airline you flew with (was it BA? That's who I am flying with), and where from.
I will be coming from London Heathrow to Chicago O'Hare.
I've had customs broker/agent fees estimated at almost three times the cost of yours which sees very very very high - especially as I will be at the airport to pick pick up.
It seems astonishing that the owners can't the customs clearance and pick up ourselves, given it should be paperwork for questions I will be able to answer.
Do you think regulations may have changed post covid? Would really helpful to know a bit more about your experience.