https://marketplace.tf/items/tf2/255;5;u19

$22.99 / $2.04 = 11.27 keys

$21.99 / $1.97 = 11.16 keys

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https://backpack.tf/profiles/76561198415564349#!/compare/1589500800/1589587200

https://backpack.tf/profiles/76561198342161127#!/compare/1589500800/1589587200

Near ID 8797831081 in first compare link, 8 keys and 25 refined

The dupe history makes it look weird https://backpack.tf/item/276608229

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https://backpack.tf/profiles/76561198337734785#!/compare/1589500800/1589587200

https://backpack.tf/profiles/76561198005764743#!/compare/1589328000/1591401600

Untraceable

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https://backpack.tf/profiles/76561198232041512#!/compare/1591315200/1591401600

https://backpack.tf/profiles/76561198005764743#!/compare/1589328000/1591401600

Bulk for Smoking Exq Rack

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https://backpack.tf/profiles/76561198355796365#!/compare/1593043200/1593129600

https://backpack.tf/profiles/76561198364147356#!/compare/1592784000/1593129600

Untraceable

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https://backpack.tf/profiles/76561198237486466#!/compare/1592179200/1592352000

https://backpack.tf/profiles/76561198157274202#!/compare/1592265600/1592352000

Untraceable

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bot.tf has many sales from 8-9 keys, including buys

https://gyazo.com/aecb06d96c5366522142332b83af8839

Sales

1 @ 9 keys 5/17/2020, 3:53:28 AM

1 @ 8 keys, 29.00 ref 5/31/2020, 2:19:02 AM

1 @ 9 keys 6/10/2020, 5:54:28 AM

1 @ 9 keys 6/25/2020, 7:36:28 PM

Buys

1 @ 9 keys, 12.00 ref 5/10/2020, 6:30:04 AM

1 @ 9 keys, 11.00 ref 5/12/2020, 10:05:13 AM

https://backpack.tf/profiles/76561198305494036#!/compare/1589587200/1589673600

This is apparently the 9 key 5/17 bot.tf sale

https://backpack.tf/profiles/76561198985910282#!/compare/1590796800/1590883200

https://backpack.tf/profiles/76561197963485175#!/compare/1590192000/1591401600

8 keys 29 refined 5/31 sale

https://backpack.tf/profiles/76561198442349647#!/compare/1591740000/1591826400

https://backpack.tf/profiles/76561198237486466#!/compare/1591315200/1591747200

9 keys 6/10 bot.tf sale

https://backpack.tf/profiles/76561198157274202#!/compare/1592352000/1592438400

https://backpack.tf/profiles/76561198355796365#!/compare/1592265600/1592352000

This is apparently the 9 keys 6/25 sale

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Seller on stn.tf at 9 keys 40 refined

https://gyazo.com/93d9325e672c8af04246b8f63d9f17cc

https://gyazo.com/128edf22258da9dc5c457541f8ce7244

2 month seller at 12 keys

Sales

8.5

9

9

9

2x 9 key buys

11

11

11 looks high

i go 8.5-9