there are a few ways to get your money you can set it up to have them pay you with a check or money order or you can set up a account on paypal and the money will go into your paypal account then you can either leave it there or transfer it to your checking account
It goes into your Paypal account and stays there until you tell Paypal what to do with it.(You *do* have a Paypal account, right? And you said in your auction listing that you accept Paypal as your method of payment?)