Sale #1

http://imgur.com/a/kWbIU

(15) Keys + (10) Pro Strange Rocket Launcher = (25)

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Sale #2

http://imgur.com/a/K66B2

(40) Keys (Excluding high, I don't want to talk about it...)

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Sale #3

http://steamcommunity.com/market/listings/440/Strange%20Festive%20Warhawk%20Rocket%20Launcher%20%28Field-Tested%29

$34.43 (14) Keys (Excluding low, 10 days shy of 3 months old)

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No sales on Marketplace:

https://marketplace.tf/items/15150;11;w3;kt-0/Strange%20Warhawk%20Rocket%20Launcher%20(Field-Tested)

(2) currently on Outpost, neither with a B/O:

http://www.tf2outpost.com/trade/29285954

http://www.tf2outpost.com/trade/29346390 (Professional)

My 25 key trade was listed less than 1 week with a 25 B/O. This item traded so infrequently basing on the single sale should be fine. Haven't done a skin before.. we'll see how this goes.