Mine has been offered a gfetti kabuto + ~ 10 keys in sweets. The person also had a trade up with a 1:1 of the kabuto for a rocket and couldn't get a trade. the kabuto is listed here at over 40 keys

http://www.tf2outpost.com/trade/7216561

Upvote, no-one is willing to sell at the current price. I actually feel it should go higher but this is a starting point

To add more proof to this man's suggestion, my current and recent trade, still haven't accepted top offer of bud + 10 keys (which is 35 keys)

http://www.tf2outpost.com/trade/7325386

Upvoted, the proof is there.