This thing angers me, I buy it in November for $45, I list it for $65 the same day, one later sells the same day for $89, then in January I had it listed for $100 another sells for $116.67..... gets even better.... I had it still for $100 and another sells again for $115 in February.... I finally give lowered it to $90 and after a few weeks gave up on it completely and qs to buyers and then 4 days later one sells again for full above what I had it listed for.... great item....

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Sale # 1 - https://marketplace.tf/items/tf2/1157;5;u3027 | no clue on history | no clue on b/o

$115 / $1.76 = 65.34 keys

Sale #2 - https://marketplace.tf/items/tf2/1157;5;u3027 | https://backpack.tf/item/4030229321 | qs to buyer

$72.01 / 1.91 = 37.7 keys

Sale #3 - https://marketplace.tf/items/tf2/1157;5;u3027 | no clue on history | no clue on b/o

$100 / 1.89 = 52.9, rounded to 53 keys

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Excluding 65 keys due to unsold sellers - https://gyazo.com/95c3d487c7c426597ccbb361317c3b83

Excluding 37.7 due to mp buyers - https://gyazo.com/f3c1b5071f7093923e9593d37d21522a

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Taking 53 flat