From the My eBay at the top of the page, go to your Purchase History.
Under the Purchases bar, choose to Show: Archived.
From the Period bar you can select which year, but only going back 3 years.
You can view them from first to last or last to first with the Sort bar.
If you have a paypal account, however, you can go there to see every purchase you've ever made with it.
But your ebay only stores 3 years' worth.
