Yes, duffel bags full.
But it doesn't take too many cash purchases that are not inline with your tax returns before somebody is going to start snooping around.
edit: although sometimes, a lot longer than one might expect.
Disappointly small bag to buy most cars with 100 dollar bills
> Yes, duffel bags full.
Citation needed? Where did you hear that this is a routine occurrence? That seems risky for everybody involved, and it requires a report to the government from the seller.