Ok here we go. 2nd try. Forgot to round!

There is no Bot.tf data available for the strange Snowmann. No sales or buys for the past 30 days.

https://bot.tf/stats/item?def=30829&q=11&ef=&craft=1&aus=0&ks=0

https://imgur.com/a/zadSkSL

Since no data on bot.tf or the classifieds (only buy orders), I'm using marketplace and Steam Community Market.

Past 7 days

Marketplace.tf sale

https://marketplace.tf/items/30829;11/Strange%20Snowmann

Sold for $40.00 USD on June 5, 2019

https://imgur.com/a/hwqP9Bd

Keys were $1.80 on June 5, 2019:

https://imgur.com/a/5UhNgF6

40.00/1.8=22.2 keys.

Steam Community Market sale

https://steamcommunity.com/market/listings/440/Strange%20Snowmann

Sold for $39.36 on June 6, 2019

https://imgur.com/a/PhgtL0O

Keys were $2.36 on June 6:

https://imgur.com/a/QWO3Q8B

39.36/2.36=16.68 keys. 16.7 keys

There are no strange Snowmanns left on marketplace and there are only 5 left on SCM which are listed for over $54.00 USD. No current sale orders. This price might seem too high for some people, but these are hard to come by and sales are sales.