The hat: https://backpack.tf/item/16047955800

Sell order was listed with a 110 key buyout.

Total trade was Shining Bokeh Checkered Past, Sunbeams Polar Bear, and 10 keys.

https://backpack.tf/profiles/76561199245111940#!/compare/1756771200/1757203200

https://imgur.com/a/BuxSQBX

Shining Bokeh Checkered Past had a sale on marketplace.tf for 74.44 USD (74.44/1.8 = 41.36 keys) - aligns closely with high end of last accepted price suggestion. Round to 40 keys.

https://backpack.tf/stats/Unusual/Checkered%20Past/Tradable/Craftable/370

https://marketplace.tf/items/tf2/31503;5;u370

Sunbeams Polar Bear's last price evaluation was 60 keys. A sell order exists at 59 keys, and a marketplace.tf listing exists at 114.99 USD (114.99/1.8 = 63.88 keys). Close enough to last known evaluation to consider 60 keys as a valid pricing.

https://backpack.tf/stats/Unusual/Polar%20Bear/Tradable/Craftable/17

https://marketplace.tf/items/tf2/30964;5;u17

40 estimate + 60 estimate + 10 keys = 110. This matches the original buyout.

If this trade is not sufficient as record, if another Overcharged Checkered Past surfaces and is traded, this can be used as reference.

Having recently learned about Classified snapshots, here's the reference on the sell order:

https://next.backpack.tf/classifieds/snapshots/Overcharged%20Checkered%20Past/68bd656e3b11db043d064457

The other known one:

https://backpack.tf/item/16163782532

Hat went with the entire inventory of the previous owner:

https://backpack.tf/profiles/76561198323097488#!/compare/1758067200/1758931200

Current owner is selling it on marketplace.tf for $199.99 USD.

Based on the owner advertising backpack buying, and the whole backpack disappearing without any incoming trade items (and is still currently empty), it is likely the backpack was sold in its entirety.

It will be difficult to isolate any specific value for this hat specifically using that.

Using the backpack.tf pricing as additional input, 199.99/1.9 = 105.2579 -> 105.26 -> 105 keys.

If the hat sells at this price, we may need to close this suggestion and open a new one with 105 - 110 range.

Sorry, forgot to link marketplace.tf for the aforementioned hat:

https://marketplace.tf/items/tf2/31503;5;u379

A third has surfaced, currently listed with a sell order at 80 keys. This one being significantly lower may require closing this suggestion and adding a range, especially if it successfully sells.

80 key listing on the third now lowered to 75.

Closing and re-making with a better range.