I keep track of my purchases on ebay by copying and pasting ,the whole item page including photos, into an email then email it to myself.
I keep saying I am going to print them out and put them in a folder or at least back them up. I may get to it soon!! ha ha

I have been buying a lot lately so I email it just before I go to paypal or write a check. It is the only way I can keep up with myself.