Easy, - go to the My eBay at the top of the page, scroll down to your Purchase History.
Under the coloured Purchases bar select Archived.
It only goes back 3 years, and from the Period bar you can pick which year.
You can also use the Sort bar to view from oldest or most recent.
If you wish to see things older than 3 years, your paypal account (if you have one) stores every purchase you've ever made with it. Transaction receipts may also be saved up in your regular email, if you keep them.
