Just realised after I closed this that the higher sale is an outlier anyway so the more accurate mini doesn't really matter but oh well.

Sale 1

Sold for 20 keys pure

This seller's name is amazing btw

Seller before: http://backpack.tf/profiles/76561198043781630?time=1424505600 (February 21st)

Seller after: http://backpack.tf/profiles/76561198043781630?time=1424592000 (February 22nd)

Sale 2

Sold for ge counterfeit billycock (48) = 48 * 0.9 = 43 keys

Seller before: http://backpack.tf/profiles/76561198074704764?time=1423468800 (February 9th)

Seller after: http://backpack.tf/profiles/76561198074704764?time=1423555200 (February 10th)

Mini for ge billycock:

Sold for purple fetti syberian facehugger (48-59) = 53.5 * 0.9 = 48 keys

Seller before: http://backpack.tf/profiles/76561198074704764?time=1426230000 (March 13th)

Seller after: http://backpack.tf/profiles/76561198074704764?time=1426402800 (March 15th)

Micro for p fetti facehugger:

http://backpack.tf/vote/id/5539fe3cba8d8800378b4671 48-59

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BOs and offers (support proof):

http://www.tf2outpost.com/trade/24002656 - 30 key BO unsold 4 months with no offers

http://www.tf2outpost.com/trade/25207016 25 key BO unsold 1 month, only offer is for a steaming cyborg stunt helm + 5 csgo keys = ~23 keys

http://www.tf2outpost.com/trade/25611821 25 key BO, unsold 2 weeks, offer of circling heart bombing run (35ish but outdated)

Based on the BOs that are unsold, gonna call the higher sale an outlier and go with the pure sale. Feedback welcome.