Sale 1:

47 keys keys pure: https://backpack.tf/profiles/76561198350910856#!/compare/1540684800/1540771200

Sale 2:

$85 USD on marketplace.tf: https://marketplace.tf/items/184;5;u87

Keys are $1.7 at the time of sale, therefore taking it to be 50 keys

Sale 3:

Gatsby + 3 keys = sunbeams jumper's jeecap: https://backpack.tf/profiles/76561198350910856#!/compare/1540339200/1540425600

At the time of sale, jeecap was in-date at 66.5 keys, therefore taking the sale to be 63.5 keys (excluding outlier)

Sale 4: (credits to Aslan)

50 keys pure

https://gyazo.com/d385441a579e2f4655f6b27ce4175f06ale 5:

Sale 5:

85 USD on marketplace.tf

https://marketplace.tf/items/184;5;u87/Frostbite%20Gentleman's%20Gatsby

Keys were 1.65 on average at the time of sale.

https://marketplace.tf/items/5021;6/Mann%20Co.%20Supply%20Crate%20Key

85/1.65 = 51.51, rounding to 52 for neatness.

Sale 6:

Sold +25 keys for a demonflame fed fighting fedora (excluding and using it as part of the Fed's suggestion)

https://backpack.tf/profiles/76561198062711407#!/compare/1545177600/1545350400

Overall price:

The 6 most recent sales are between 47 and 63.5 keys. Current quickbuyers at 40 keys suggests the current range is outdated. Only one seller at 60 keys. Rounding 63.5 is an outlier as most pure sales revolve around 50 keys. Taking 47-52 to be the range.

As always, any and all help is greatly appreciated. Happy trading!