Torb said counter, so counter I shall.

Sale 1: https://backpack.tf/profiles/76561198090339904#!/compare/1531353600/1531440000

https://backpack.tf/profiles/76561198086948995#!/compare/1531353600/1531440000

https://backpack.tf/profiles/76561198086793593#!/compare/1531353600/1531440000 sold for 2 keys + dupe scorching gonzilla

https://imgur.com/a/DjP78tN given 2 sellers for lower than the gibus sale, gonna range with a clean seller as the low end and a dupe sale as the high end. Taking 50-54 aka 52, x=52

Mini for gibus: https://backpack.tf/profiles/76561198093617997#!/compare/1531353600/1531872000 sold for aces runners, bubbling tavish, orb fire dayjogger, fod disco and 3k

Runner uses indate sales so taking indate price of 14k

Tavish mini: https://backpack.tf/profiles/76561198157010361#!/compare/1531872000/1531958400

https://backpack.tf/profiles/76561198086793593#!/compare/1531872000/1531958400 sold for dp mullet + sweets,

https://imgur.com/a/QzGJc1O buyer selling for 12 keys, taking 12 for that sale due to that, seller at 11 also so taking range of 11-12 for it aka 11.5

Dayjogger mini: No mini for this, using 18 keys (bp price)

Taunt: https://backpack.tf/profiles/76561198305676157#!/compare/1531778400/1531864800 sold for 5k 18 ref?, https://imgur.com/a/VFds3f6 bot.tf says 6k, given another sale at 5k 18 ref ill take this as 5.5 keys

Total for gibus: 14+11.5+18+5.5+3=52, taking 52k for gibus

Sale 2: https://backpack.tf/profiles/76561198045992174#!/compare/1531612800/1531785600

https://backpack.tf/profiles/76561198090339904#!/compare/1531526400/1531612800 sold for 21 keys and helish killer solo

Mini taunt: https://marketplace.tf/items/30609;5;u3013 sold for 26.99, keys were 1.9, 26.99/1.9=14.2052632, taking 14k

21+14=37, taking 37 for sale 2

Sale 3: https://backpack.tf/profiles/76561198282655482#!/compare/1528588800/1528675200

https://backpack.tf/profiles/76561198197962410#!/compare/1528156800/1528761600 sold with buds for vivid fro, 1 key and spec ks aussie grenade. This sale is better for the fro, it has a 2 year old price

https://backpack.tf/item/6131899273 this key matches, at the time of posting the others disappeared

This sale is 33 Keys.

Fro Mini (credits to Lemon)

https://backpack.tf/profiles/76561198205727409#!/compare/1531612800/1531699200 - Needs trucker's mini so eh

https://backpack.tf/profiles/76561198244596240#!/compare/1530921600/1531008000 - Bubbling Hetman's Headpiece (~8) + Midnight Whirlwind Taunt: Deep Fried Desire (~4) + 5 Keys + ~3 in Sweets = 20

https://backpack.tf/profiles/76561198053877033#!/compare/1530921600/1531267200 = ~19 Keys (Using 18 unsold on noble)

Sale 4: https://backpack.tf/profiles/76561198197962410#!/compare/1529280000/1529366400

https://backpack.tf/profiles/76561198302384193#!/compare/1529193600/1529280000 sold with ks aussie sticky for dupe beams coupe and 9 keys of adds

Mini for coupe: https://marketplace.tf/items/330;5;u17 sold for 110$, keys were 1.97, 110/1.97=55.8375635 aka 56, pretty terrible mini for coupe but only one i could find, month unsold clean at 50 keys https://imgur.com/a/Lk63GF0 , this mini just seems too high, excluding sale as a whole

Sale 5: https://backpack.tf/profiles/76561198056793444#!/compare/1529193600/1529280000

https://backpack.tf/profiles/76561198302384193#!/compare/1529193600/1529280000 nothing matches, excluding

Now for a sale of my own

Sale 6) Sold for a Purple Confetti Winter Woodsman (28.5 Keys) + 13 Keys

https://backpack.tf/profiles/76561198056793444#!/compare/1532736000/1532822400

28.5 + 13 = 41.5, which rounds to 42 Keys

Woodsman Mini

https://backpack.tf/suggestion/5b531f3a44325a69525d9574 - 28.5 Keys

The second sale is capped at 28 Keys, but the range still holds -> http://www.tf2outpost.com/trade/29681261

Calling 52 high.