After 10 months, it no longer shines bright like a diamond.

http://backpack.tf/item/941312914

Sale 1) Sold + 20 Keys for a Screaming Tiger Conga + Green Energy Pyromancer's Mask (145 Keys) + Infernal Flames Box Trot (102.5 Keys)

http://backpack.tf/profiles/76561198148511293#!/compare/1481155200/1481241600 - Seller's Backpack

http://backpack.tf/profiles/76561198010711154#!/compare/1481155200/1481241600 - Buyer's Backpack

High Outlier.

Sale 2) Sold for a Spellbound Kiss King (370 Keys)

http://backpack.tf/profiles/76561198010711154#!/compare/1481500800/1481587200

SUPPORTING SALE

Sale 3) Sold for a Death at Dusk Well-Rounded Rifleman (<250 Keys) + Circling Hearts Bear Necessities (90 Keys) + Ooze Ze Goggles (~40 Keys)

http://backpack.tf/profiles/76561198152778610#!/compare/1481500800/1481587200

<250 + 90 + ~40 = Roughly 370 Keys or lower. Supports Sale 2.

Rifleman Mini

There are no sales on the Rifleman, but there are Sellers at 250 Keys

http://imgur.com/a/Zu6zl - 1 is Unsold for a Month, so this is realistically lower

Bear Mini

http://backpack.tf/suggestion/5815de3ec440451282109e3d - 90 Keys

Ze Goggles Mini

http://imgur.com/a/4yNXO - 18 Day Unsold at 40 Keys

http://imgur.com/a/4paw5 - Nearly 1 Month Unsold at 580 Keys supports a drop.