Go to Amazon.com > Your Account > Your Orders. If you go through by the year, you can find your earliest Amazon orders.
Apparently I bought this headset. I don't remember ever ordering, receiving, unboxing, wearing, or otherwise using. Granted, that was almost 10 years ago.
I didn't place another order until April 2006 — nine months between orders! I made just three orders in 2006: Japanese punk, LOST DVDs, and a LOST jigsaw puzzle (#1 of 4). That wasn't a Christmas order for someone else — I definitely remember putting that together myself.