Tick Tock.

23 still Valid.

http://backpack.tf/item/1673855132 - Using anything after April 25th

Sale 1) Sold for an Orbiting Fire Merryweather (17) + 1 Key in Sweets = 18 * 0.9 = ~16 Keys

http://backpack.tf/profiles/76561198031690733?time=1429965782

Sale 2) Sold for a Miami Liquidator (21) * 0.9 = 19 Keys

http://backpack.tf/profiles/76561198005606171?time=1430475675 --- Buyer After

~ http://backpack.tf/profiles/76561198096716292?time=1433746800 --- Miami Liquidator sold for a C9 Liquidator (21) --- Buyer After

http://www.tf2outpost.com/trade/26077417 --- Unsold for 12 Days at 20

~These were the only sales that I could track or that made sense~