Sale #1:

https://backpack.tf/profiles/76561198414486164#!/compare/1549670400/1551225600

Untraceable.

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Sale #2:

https://backpack.tf/profiles/76561198213568796#!/compare/1547596800/1548374400

Untraceable.

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Sale #3:

https://bot.tf/stats/item?def=30761&q=5&ef=Poisonous+Bubbles+of+Regret&craft=1&aus=0&ks=0

https://backpack.tf/profiles/76561198335791307#!/compare/1548543600/1548630000

Bought for 7 keys.

7 keys

Sales:

7. Going with 7 keys.