To check the status of any sale, just click on the "Sales" link from your "My Account" page. Here, you will be able to:
Search by Transaction number or Buyer ID
Search by Status (All Sales, Received, Shipped, Refunded, Closed)
Search by any past period of time, from a minimum of 7 days past to 90 days past
To view a sale older than 90 days, you can click on "Payment History" where you will have a list of your completed Sales sorted by date range/pay period for up to the past 18 months.