As of late I have gotten back into TF2, as well as trading. Out of curiosity, I was looking through my trade history and noticed I had traded 4 keys to a dispenser.tf bot on March 20, 2015 (roughly around when I had quit.) Screenshot: http://puu.sh/qdhQI/f3164a7aa3.png

Those keys had come from a large amount of items I had sold at the time. Curious as to what I had done with them on dispenser.tf, I went to the website itself. I looked in the history tab (https://dispenser.tf/history/76561198062839511) and to my confusion, I see absolutely nothing.

Is there any way to see where those 4 keys went or what I spent them on, considering I don't remember? After putting those 4 keys into Dispenser.tf, I hadn't traded anything for a month and then a year after that. Can anyone tell me how or what I spent those keys on?

EDIT: I checked my gift redemption history as well (to see if I traded the keys for games)... Nothing. So I put 4 keys into this website a year ago and they disappeared?

Since you sent keys to a VIP bot and getting nothing in return I am 99% sure you bought an untradable gift.

EDIT: You bought an untradable Payday 2 gift, found it in the gifting history of the bot you sent keys to.

PAYDAY 2
Gift
Sent to Goldpax on 21 Mar, 2015
Redeemed on 21 Mar, 2015