I can't believe this is outdated already, time sure flies sometimes...

Only 3 in existence (Despite stats.tf only says 2), one is in a collectors BP and hasn't sold in 4 months, (http://www.tf2outpost.com/item/440,3292713783,30041,5) and one is in a collectors BP and hasn't sold since last suggestion (http://www.tf2outpost.com/item/440,3436651856,30041,5)

Recent sales:

Sale 1:

http://www.tf2outpost.com/trade/25703686 http://backpack.tf/profiles/76561198097169690?time=1429426800 to http://backpack.tf/profiles/76561198097169690?time=1429599600 Sold for a C-9 Robo Glove (24 keys), 22 keys after overpay, and althought the sale was in it's suggestion, it was not used to price it, so it should be fine.

Final sale value: 22 keys

Sale 2:

http://www.tf2outpost.com/trade/25765184 http://backpack.tf/profiles/76561198123977468?time=1429686000 to http://backpack.tf/profiles/76561198123977468?time=1429772400 Sold for a DP Bonk Boy, outdated at 42 keys, mini at 38 keys, as overpay is provided in the mini already, none is necessary.

Final sale value: 38 keys

Bonk Boy mini:

http://www.tf2outpost.com/trade/25282103 http://backpack.tf/profiles/76561198000540604?time=1425970800 to http://backpack.tf/profiles/76561198000540604?time=1426489200 Sold for a G.E. Milkman (36.5 keys. updated today ironically :P), 33 keys after overpay, and 5 keys pure.

Mini value: 38 keys

Sale 3:

(No Outpost link available) http://backpack.tf/profiles/76561198088705111?time=1429513200 to http://backpack.tf/profiles/76561198088705111?time=1429772400 (Buyers BP, as the sellers was not available) Sold for 28 keys pure.

Final sale value: 28 keys

Sale 4:

(Sold in a day)http://www.tf2outpost.com/trade/25777216 http://backpack.tf/profiles/76561198088705111?time=1429772400 to http://backpack.tf/profiles/76561198088705111?time=1429858800 Sold for a Miami Hoodie, outdated at 42 keys (Just like the Bonk Boy...), mini at 22 keys, no overpay is necessary as it was applied in the mini.

Final sale value: 22 keys

Hoodie mini:

(No Outpost link) http://backpack.tf/profiles/76561198101494973?time=1427266800 to http://backpack.tf/profiles/76561198101494973?time=1427353200 Sold for a Stormy Cannonball (24 keys), 22 keys after overpay.

Mini value: 22 keys

Sale 5:

http://www.tf2outpost.com/trade/25784355 http://prntscr.com/6y2xjv (Credit to Cowler for the shot) Sold for a DP Tyrolean, outdated at 23 keys, mini at 18 keys, as overpay was not nessisary in the mini, 16 keys after overpay, 5 keys pure, a Strange Pro. K.S Syringe Gun with 2 keys in parts, mini at 2 keys, a strange Spec. KS Sniper Rifle with 7 keys of parts and spells, mini at 5 keys, a Strange Spec. KS Rust Botkiller Medi Gun Mk.I, mini at 2 keys, and ~1 key in strange cosmetics, all after overpay, 8 keys

Final sale value: 24 keys

Tyrolean mini:

Literally NO valid saes I could find, but there is a seller with an unsuccessful B/O of 18 keys for 4 days, http://www.tf2outpost.com/trade/25794536 so using that.

Mini value:18 keys

Syringe mini:

http://prntscr.com/6zsoha As per the handy-dandy market converter, 2 keys, plus the fact when he tried selling it on Outpost, he advertised free parts http://www.tf2outpost.com/trade/25794318, not counting the parts. (Note he didn't actually sell it but he put it, and the Sniper Riffle on SCM)

Mini value: 2 keys

Sniper Rifle mini:

http://prntscr.com/6zspvr Per the converter, 1 key, and for the parts, as he was selling it for five keys on Outpost http://www.tf2outpost.com/trade/25797850 , as there are really no conpairable sellers, minus the KS, he was basically selling the parts for 4 keys, which seems reasonable too.

Mini value: 5 keys

Rust Botkiller mini: http://prntscr.com/6zsqsx 2 keys per the converter, thank god it's clean :P

Mini value: 2 keys

Sale 6:

http://www.tf2outpost.com/trade/25809442 http://backpack.tf/profiles/76561198119543185?time=1430031600 to http://backpack.tf/profiles/76561198119543185?time=1430204400 Offered on a Bubbling Phantom, 17 keys and a K-a-W Billycock, 13 keys, no overypay as they were offered, and surprisingly both are updated.

Final sale value: 30 keys

With sales at 22 keys, 38 keys, 22 keys, 28 keys, 24 keys, and 30 keys, calling 38 keys an outlier, and thought itis a bit lower than Ithoguth it would be, 22 to 30 keys looks good. 4,250+ characters and ~4 hours, gg :)