For items older than 60 days, go to the My eBay at the top of the page and find your Purchase History.
Under the coloured Purchases bar choose Show: Archived.
Ebay purchases only goes back 3 years, and from the Period bar you can select the year.
You can view most recent or oldest using the Sort bar.
For items older than 3 years, if you have a paypal account you can check there to see every purchase you've ever made.
You will also have the receipts in your regular email, that is, if you haven't deleted them yourself.
