Sale #1:

Sold for 90 keys + ~5 keys in items/metal

http://www.tf2outpost.com/trade/26936020

http://backpack.tf/profiles/76561198089305440?time=1441090800&compare=1441954800

90 + 5 = 95 keys

Sale #2:

http://www.tf2outpost.com/trade/25559757

Sold for Stormy Brown Bromber (42) + Pro KS Australium Flame (~24 keys) + FN Strange Spark of Life Medi Gun (~12 keys) + 24 keys

http://backpack.tf/profiles/76561198028540608?time=1441782000&compare=1441868400

((42 + 24 + 12) * 0.9) + 24 = 94 keys

Sale #3:

Something involved with a PE Brown Bomber

http://backpack.tf/profiles/76561198093383111?time=1446537600&compare=1446624000

Sale #4:

Sold within hours for 80 keys

http://www.tf2outpost.com/trade/27075464

http://backpack.tf/profiles/76561197977395790?time=1443078000&compare=1443510000

Pro KS Australium Flame:

http://steamcommunity.com/market/listings/440/Strange%20Professional%20Killstreak%20Australium%20Flame%20Thrower

Averages around $65 around the time of sale. ~24 keys

Current sellers in classifieds match up around there as well: http://i.imgur.com/cRvDgQ5.png

FN Spark of Life Medi Gun:

http://steamcommunity.com/market/listings/440/Strange%20Spark%20of%20Life%20Medi%20Gun%20%28Factory%20New%29

Averages around $30-$35 around the time of sale. ~12 keys

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Sales are at 80, 94, 95. The 80 key sale is excluded because of how fast it sold. Setting the price at 95 keys to avoid a 1-key range would be best. <3