Wooo new effects

http://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20Conga?filter=hellish Unsold at $292 SCM, which comes up to ~117 Keys

https://marketplace.tf/items/1118;5;u3013 Two unsolds at $180 and $200 on Marketplace, which would come up to ~86 and ~95 Keys respectively

The sale adolf mentioned that involved the Outdoorsman and low tiers is perfectly useable, and that's the sale that should be used for the conga to begin with:

Sold for a Chiroptera Venenata Outdoorsman(~50 Keys), a Flaming Lantern Physician's Protector(32.5 Keys, rounding to 33) and an Orbiting Planets Private Eye(~12 Keys)(~95 Keys total)

http://backpack.tf/profiles/76561198002186909#!/compare/1485820800/1485907200

https://gyazo.com/b6040190776aaefc930f5d7d988c669b

Chiroptera Venenata Outdoorsman mini suggestion

Sold for a Dead Presidents Fed-Fightin' Fedora(45 Keys) and 13 Keys(B/O was 50)

http://backpack.tf/profiles/76561198073472840#!/compare/1485648000/1485734400

http://backpack.tf/profiles/76561198190727030#!/compare/1485648000/1485734400

http://www.tf2outpost.com/trade/28750112

Sold with a Max's Severed Head(19 Keys) for an Ooze Sheriff's Stetson(~68 Keys)(~49 Keys total)

http://backpack.tf/profiles/76561198179746155#!/compare/1486598400/1486684800

Not viable for a full suggestion for reasons Foamy stated on the other suggestions, but it should be viable as a mini. Using 50.

Nevertheless this is going to be too high as suggested by the three sellers I provided alone, feel free to resuggest once the eye, physician's and outdoorsman have been mini'd.