Yes

Taking Marketplace and SCM sales

Using Sales from August 28th and so forth (Last suggestion had too big of a range and the older sales were too high)

--MP Sales--

https://marketplace.tf/items/tf2/30515;13;strange

SEP 14th @ $13.00 / 1.84 = ~7.06 --> 7 keys Proof: https://manic.tf/keyprice/?at=2019-09-14

SEP 18th @ $9.16 / 1.81 = ~5.06 --> 5 keys Proof: https://manic.tf/keyprice/?at=2019-09-18

SEP 20th @ $9.17 / 1.82 = ~5.03 --> 5 keys Proof: https://manic.tf/keyprice/?at=2019-09-20

--MP Sales--

--SCM Sales--

https://steamcommunity.com/market/listings/440/Strange%20Haunted%20Wings%20of%20Purity

AUG 28th @ $15.00 / 2.32 = ~6.46 --> 6.5 keys (using 8PM key sales)

SEP 8th 12AM @ $15.00 / 2.30 = ~6.52 --> 6.5 keys

SEP 10th 4PM @ $14.97 / 2.38 = ~6.28 --> 6.3 keys

SEP 14th 12AM @ $17.29 / 2.34 = ~7.38 --> 7.4 keys

SEP 16th 6PM @ $16.01 / 2.39 = ~6.69 --> 6.7 keys

SEP 20th 2AM @ $15.44 / 2.39 = ~6.46 --> 6.5 keys

Key prices: https://steamcommunity.com/market/listings/440/Mann%20Co.%20Supply%20Crate%20Key

--SCM Sales--

--

Classifieds: https://gyazo.com/b98ca588057f7d9954a97d5c2935fd9d

Summary of Sales:

5, 5, 6.3, 6.5, 6.5, 6.5, 6.7, 7, 7.4

--

Price: 5-6.7

Two recent sales at 5, unreasonable to exclude.

7 and 7.4 need to be excluded cause nothing really supports them.