First off all proof belongs to chestonic.

If this is stealing proof or something against the rules, i'll take it down.

The seller at 1.1 in gate's suggestion appears to be duped.

Also adding a mini for the ghosts handle.

Sale #1: 1.2 * .9 = 1.1 buds = 16 keys at the time.

http://www.tf2outpost.com/trade/23783572

Sold for a Terror Watt Attendant.

DP Attendant: http://www.tf2outpost.com/item/440,3225585605,213,5

Terror Attendant: http://www.tf2outpost.com/item/440,3023031203,213,5

Sale #2: 13.5 keys + 1 bud = 1.9 (Appears to be an outlier, and mini's are kind of weak)

http://www.tf2outpost.com/trade/24468206

Sold for a Steaming Soviet Gentleman and a Nuts and Bolts Pompadour.

Attendant: http://www.tf2outpost.com/item/440,3395140296,213,5

Proof of the trade:

The attendant: http://i.imgur.com/6DzTSLb.png

The gentleman: http://i.imgur.com/A85ceaT.png

The pompadour: http://i.imgur.com/yDM7Chm.png

The Soviet Gentleman is approximately 13.5 keys like the previous suggestion said, there are no Nuts and bolts Pompadours on the market at the moment, all i have is a screenshot of what i paid for it as an approximation (shown in the minis).

Sale #3

Ghost handle = 1.3

Attendant: http://prntscr.com/5rndzc

Ghost Handle: http://prntscr.com/5rnacb

Minis

Terror Watt Attendant: 1.3 * 0.9 = 1.2 buds

http://www.tf2outpost.com/trade/24296334

Sold for a PE Handy Man's Handle.

Handle: http://www.tf2outpost.com/item/440,3347992442,253,5

Attendant: http://www.tf2outpost.com/item/440,3338500548,213,5

Pompadour:

Offer for the Pompadour: http://i.imgur.com/CgxgxZF.png

The Planets Flamenco that was traded is and was priced at 1-1.3 buds

Ghost handle

Recently sold with a pro ks s rainblower (3 keys) and a spec ks rust botkiller rocket launcher (2.5 keys) for a spec ks aussie flame thrower (~23)

23-5.5 = 17.5 ~ 1.3

Soviet Gentleman:

Going to use the mean of the only 1 on outpost's B/O and the current price.

http://www.tf2outpost.com/trade/24344683

11 <-> 15 = 13.5 keys