Guess it ain't so stable anymore. Stuff taken from my first suggestion made ~21 Days ago(so it may not be all up to date)

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Sold for a Haunted Phantasm Jr. Ground Control(80 Keys with Overpay)*, a Screaming Tiger Rock, Paper, Scissors(105 Keys with Overpay), a Haunted Ghosts Western Wear(17 Keys with Overpay), 5 Buds(70 Keys at the time), a Pro KS Scattergun Kit(~18 Keys with Overpay), and minor sweets ~13 Keys(After overpay)(303 Keys total, rounded to 300)

http://backpack.tf/profiles/76561198072165163?time=1421665654 -> http://backpack.tf/profiles/76561198072165163?time=1421913600

http://www.tf2outpost.com/trade/24555076

Sold for Frostbite Spook Specs(196 Keys with Overpay) and a Cloud 9 Neckwear Headwear(90 Keys with Overpay)(296 Keys total)

http://backpack.tf/profiles/76561198038509148?time=1422000000 -> http://backpack.tf/profiles/76561198038509148?time=1422000000

http://www.tf2outpost.com/trade/24154088

Sold for a Duped Spellbound Flamboyant Flamenco(122 Keys with Overpay), a Poisoned Shadows Surgeon's Stahlhelm(162 Keys with Overpay) and a Strange Festive Spec KS Stickybomb Launcher(~13 Keys with Overpay at the time)(297 Keys total)

http://backpack.tf/profiles/76561198038509148?time=1422934825 -> http://backpack.tf/profiles/76561198038509148?time=1423296000

http://www.tf2outpost.com/trade/24794002

Duped Spellbound Flamboyant Flamenco mini suggestion

Sold for 15 Buds(120 Keys at the time) and a Miami Nights Bonk Boy(48 Keys with Overpay)(168 Keys total)(B/O was 17 Buds/136 Keys)

http://backpack.tf/profiles/76561198038509148?time=1427636389 -> http://backpack.tf/profiles/76561198038509148?time=1427698800

http://www.tf2outpost.com/trade/25304780

Using 136.

* = There's no valid sales for the Ground Control ever since it got priced, as Giovanni was hijacked, and the only useable sale is this one. Using current price.

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NEW SALE!(Credits to Henri Death)

Sold for 270 Keys

http://i.imgur.com/PG8LrUG.png

http://imgur.com/Mgyxb5n

Low end comes from the pure sale, high end comes from all the other sales. 270-300 Keys should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.