1) Barnstormer + 1 key for 1 bud http://i.imgur.com/ym43q7e.jpg http://i.imgur.com/ODEi5FC.jpg http://i.imgur.com/ef6CEnP.jpg /// ~ 16 keys

2) Barnstormer + 4 keys + 2 games for 1 bud. http://i.imgur.com/0T35Lrn.jpg http://i.imgur.com/PgYxlFM.jpg http://i.imgur.com/hI0TBb6.jpg

Games are pretty cheap:

farcry 3 – notable offer (1 key) http://www.tf2outpost.com/trade/19833085 , plenty ~ 1 – 3 months unsolds of 3-4 keys prices http://www.tf2outpost.com/trade/22346547 http://www.tf2outpost.com/trade/20881847 http://www.tf2outpost.com/trade/21088182 and many other, don`t want to spam too much links.

Dead island: could get easy even for 1 ref http://www.tf2outpost.com/trade/23023395

/// Totally ~ 12 keys

3) for 13 keys + 2 craftable hats http://i.imgur.com/cbCJBnQ.jpg http://i.imgur.com/iBnpAAh.jpg /// ~13.25 keys round to 13

Now additional proofs with outdated items (overpay calculated):

a) For a Green Fetti Sultan`s Ceremonial http://i.imgur.com/whqQhz2.jpg http://i.imgur.com/XDZ6nIJ.jpg http://i.imgur.com/TbZaC5l.jpg /// ~ 14 keys

b) for little orb. Planets little buddy + strange big earnier http://i.imgur.com/R3mbzjH.jpg http://i.imgur.com/G6tTruR.jpg http://i.imgur.com/u3Kbdqo.jpg /// ~ 15 keys

P.S. Price is quite fresh (2 months), but seems not accurate now