1 in existence, it has sold twice recently

http://www.tf2outpost.com/trade/12273003 - B/O 25 buds

Sold for Antifreeze Warpig(~18.7 buds)

http://www.tf2outpost.com/trade/13369323

Best offer so far(in all the posts) is Electrostatic Executioner(~17.4), but no offers above the previous sale.

From ProdigalX:

" http://www.tf2outpost.com/trade/11695007

Traded the flies crone dome for a clean burning brigade + siberian #3 + last breath #33 + 5 keys + strange degreaser + strange flare gun + strange axtinguisher

siberian #3 was sold for a bud.

last breath #33 - i bought it for a bud."

Which in total works out to be ~15.8 buds