Wire transfer into a new bank account. Once the money clears, it's all theirs.
It's easy to open a new account at the bank and by using it you keep all your other accounts disconnected from it. You can transfer the money between your accounts later.
That is correct. I have two accounts for this purpose. Funny thing is, the bank gave me a hard time when I did it! They did not want to do it. There is 28 dollars in the 2nd account right now. It is just to hold it open. If I sell something it goes into the 2nd account, then I transfer it to the primary.