5 month old price, apparently the previous proofless attempt actually got the price right, go figure.

Sold for Max's (~3.3), took 5 days

http://www.tf2outpost.com/trade/23661638 (Hustler)

http://www.tf2outpost.com/trade/23742442 (Max)

Sold for Searing Plasma Towering Pillar (~2.7), outlier, sold pretty quick anyways

http://www.tf2outpost.com/trade/23740138

http://backpack.tf/profiles/76561198078986177?time=1416124800

Sold for 2 buds + 28 keys + Professional Australium SMG (~1 bud by SCM sales) = ~4.8, outlier

http://www.tf2outpost.com/trade/23799224 (The trade is young and listed at 6 buds but...)

http://www.tf2outpost.com/trade/23346680 (They've had it for far longer and are a chronic relister at the same price)

http://backpack.tf/profiles/76561198097886446?time=1416470400

http://steamcommunity.com/market/listings/440/Strange%20Professional%20Killstreak%20Australium%20SMG (Mini on SMG)

Sold for 3 buds + 4 keys, took 2 weeks

http://www.tf2outpost.com/trade/23086140

http://www.tf2outpost.com/trade/23320177 (Best confirmation I can get, backpack scan is not helpful here)

Sellers:

http://www.tf2outpost.com/trade/19238390 - 8.5 buds, 7 months

http://www.tf2outpost.com/trade/22607644 - 5 buds, 2 months

http://www.tf2outpost.com/trade/23354034 - no price, 3 weeks

http://www.tf2outpost.com/trade/23800232 - ~5.8 buds B/O, listed for 90 keys with buds at 15.5

http://www.tf2outpost.com/trade/23358727 - no price, 3 weeks, listed on SCM for $170 USD (at least I assume USD since of you folk seem to be American)

http://www.tf2outpost.com/trade/23800787 - 7 buds, young

http://www.tf2outpost.com/trade/23362821 - no price, 3 weeks

http://www.tf2outpost.com/trade/22459359 - 6.5 buds, 2 months

http://www.tf2outpost.com/trade/23791322 ~4.3 buds, young, obvious alt is obvious

http://www.tf2outpost.com/trade/23787903 - no price, hijacked

http://www.tf2outpost.com/trade/23030280 - 6 buds, 1 month