testing

https://marketplace.tf/items/tf2/17257;11;w1;pk257

$359.99 / $1.84 = 195.65 keys

$369.99 / $1.81 = 204.41 keys

https://steamcommunity.com/market/listings/440/Strange%20Spectrum%20Splattered%20War%20Paint%20(Factory%20New)

https://steamcommunity.com/market/pricehistory/?country=US&currency=1&appid=440&market_hash_name=Strange%20Spectrum%20Splattered%20War%20Paint%20(Factory%20New)

["Oct 28 2020 01: +0",287.003,"1"] = 123 keys

["Nov 05 2020 01: +0",237.249,"1"] = 101 keys

["Dec 07 2020 01: +0",364.528,"1"] = 170 keys

["Dec 09 2020 01: +0",500.008,"1"] = 244 keys

["Dec 11 2020 01: +0",226.125,"1"] = 101 keys

["Jan 05 2021 19: +0",204.69,"1"] = 86 keys

["Jan 07 2021 06: +0",365.6,"1"] = 154 keys

["Jan 25 2021 21: +0",308.615,"2"] = 130 keys

["Jan 25 2021 21: +0",308.615,"2"] = 130 keys

https://backpack.tf/profiles/76561198140316312#!/compare/1609286400/1609372800

https://backpack.tf/profiles/76561198804015732#!/compare/1609286400/1609459200

https://backpack.tf/item/9339104584

Untraceable

Sale:

86

101

101

123

130

130

154

170

195

204

244

Sellers:

https://marketplace.tf/items/tf2/17257;11;w1;pk257

https://gyazo.com/c2f7be99c2f9a17885a33c80d37aa367

$349.99 = ~167 keys

https://steamcommunity.com/market/listings/440/Strange%20Spectrum%20Splattered%20War%20Paint%20(Factory%20New)

https://gyazo.com/e953c35edb2dd975c66a2ed6361a4b34

https://gyazo.com/0cddaae08058c00473e022c4d9ce343d

$499.99 = ~203 keys

$543.22 = 221 keys

SCM Buyers to $208 https://gyazo.com/5d8c4bbbf6cd97ec0acc09befe7031ed

Which is about 86 keys

Going with 101-154, rounding to 100-150

https://marketplace.tf/items/tf2/17257;11;w1;pk257

$299.99 / $2.13 = 140.84 keys