Third re-suggestion.

Sale #1:

Sold with 4 keys for a Harvest Glengarry (52)

52 - 4 = 48 keys

Tam was offered on the Glengarry, no overpay.

http://backpack.tf/profiles/76561198097837961?time=1430550000

http://backpack.tf/profiles/76561198097837961?time=1430636400

Sale #2 (credits to Sugarcube):

Sold for a Spec KS Aussie Scattergun

39 * 0.9 = 35.1 keys rounding to 35 keys

2 other sales at 48, calling an outlier.

http://backpack.tf/item/2476432331

http://backpack.tf/item/2920027778

Sale #3:

Sold 1:1 for a Peace Bonk Boy

53 * 0.9 = 47.7 keys rounding to 48

http://www.tf2outpost.com/trade/25818638

Scattergun mini:

1 sold at time of sale for $93.50 = 39.45 keys rounding to 39 keys (keys being $2.37)

http://steamcommunity.com/market/listings/440/Strange%20Specialized%20Killstreak%20Australium%20Scattergun

His life seemed purposeless and flat...