Big credits to Squid and Coder for the screenshots.

Sale1:

https://backpack.tf/profiles/76561198034983683#!/compare/1592092800/1593820800

https://backpack.tf/profiles/76561198165222762#!/compare/1593734400/1593820800

250 keys

Sale2:

https://backpack.tf/profiles/76561198144820745#!/compare/1593820800/1593907200

https://backpack.tf/profiles/76561198165222762#!/compare/1593820800/1593907200

https://steamuserimages-a.akamaihd.net/ugc/1465310083887532827/090B30130C62C342DACD5FDF76A660FD7C937D9A/

https://marketplace.tf/items/tf2/6526;6;uncraftable;kt-3;td-312 Beast kit is ~5 keys

https://marketplace.tf/items/tf2/6523;6;uncraftable;kt-2;td-208 Flame kit is ~2 keys

PS exe + 10 keys + ~7 in KS kits for harvest exe

If harvest taken as 240-264: Then this makes the PS exe value at 222-247 keys here.

Sale3:

https://backpack.tf/profiles/76561198263190057#!/compare/1593993600/1594080000

https://backpack.tf/profiles/76561198144820745#!/compare/1593993600/1594080000

https://steamuserimages-a.akamaihd.net/ugc/1465310083887527046/088F7EE79023CF030F215E19C06BC130AF5BC806/

57 keys + HG rack (indate at 230) = 287 keys

(rack doesnt show up in compare)

Sale4:

https://backpack.tf/profiles/76561198209640976#!/compare/1587168000/1587254400

https://backpack.tf/profiles/76561198146527515#!/compare/1587168000/1587254400

143 keys + GE prehistoric (at the time in date at 120) = 263 keys

Sale5:

https://backpack.tf/profiles/76561198146527515#!/compare/1588291200/1588550400

https://backpack.tf/profiles/76561198146046621#!/compare/1588032000/1588464000

https://steamuserimages-a.akamaihd.net/ugc/1469813939149734040/42D1FC02A170CBEFD45769B56EE7CF857DCBEEAB/

210 keys

Sale6:

https://backpack.tf/profiles/76561198146046621#!/compare/1588464000/1588636800

https://backpack.tf/profiles/76561198036445124#!/compare/1588377600/1588550400

https://steamuserimages-a.akamaihd.net/ugc/1469813939149737074/AB8D321225C665662A96630C094F987258C2BC40/

230 keys

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Mini for harvest exe:

SALE1: Harvest exe + 15 keys for vivid plasma beak + PE gauzed

https://backpack.tf/profiles/76561198325595749#!/compare/1592956800/1593043200

https://backpack.tf/profiles/76561198144820745#!/compare/1592870400/1592956800

https://steamuserimages-a.akamaihd.net/ugc/1465310083887527328/3422505A826C02CB2F69B719E73CC18B7426BAEE/

Beak in date at 137, gauzed 142.5, makes the sale 142.5 + 137 - 15 = 264.5 keys

Sale2:

https://backpack.tf/profiles/76561198804015732#!/compare/1593907200/1594166400

https://backpack.tf/profiles/76561198160856661#!/compare/1593907200/1594080000

240 keys

https://backpack.tf/profiles/76561198079764636#!/compare/1586995200/1587081600

https://backpack.tf/profiles/76561198066369838#!/compare/1586908800/1586995200

Harvest exe + cmoon luchadore for c9 vvf (vvf in date at 415), luchadore in date at 200

makes this sale 415 - 200 = 215 keys (considering this an outlier, especially since it it would cause sale2 for PS exe value to fall under current buyers)

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So sales at : 250, 222-247, 287, 263, 210 and 230. Taking 210 as too low and 287 as too high. Taking 225 as low end to support range in harvest exe value.

Taking 225 - 260