well, unfortunately upvote, good proof and cant be against that xD, as the first owner of a collector bonk im rly sad :c

Looks like the 5key seller reduced to 4keys :P

The Poorly Bumped One in your unsold (total 12 keys for both items) was bought to resell. Since the overdose is worth 7 keys, that sold can equal up to 5 keys. (Could be 6 if it was given as a discount, but still falls into the range.)

Here's the original trade: http://www.tf2outpost.com/trade/17816549 (1 Week Old, Bought for possibly 5 Keys.)

----

Also, some extra additional proof for you: (Bolded are solds.)

http://www.tf2outpost.com/trade/18118984 - (13 Hours Old. Rebought the one below. Wants Pure 6 Keys.)

http://www.tf2outpost.com/trade/18071147 - (2 Day Old Trade. Sold 6 Keys.)

Upvote, since this evidence and the given above correlates with each other.