This is a resuggestion of this suggestion. Thank you Foamy.

Sale 1:

https://backpack.tf/profiles/76561198231082180#!/compare/1550880000/1550966400

https://backpack.tf/profiles/76561197962449627#!/compare/1550880000/1550966400

Sold for:

Scorching Flames Brigade Helm, Cloud 9 Slo-Poke, Fountain of Delight Mannrobics, Fountain of Delight Flippin' Awesome, Hundkopf, ~3 keys in sweets

Scorching Flames Brigade Helm is in-date at ~110 keys.

https://backpack.tf/suggestion/5c8d265cd381720ca81d928d

Cloud 9 Slo-Poke is in-date at 32 keys.

https://backpack.tf/suggestion/5c8d270fd381720e4c5bc35e

Fountain Mannrobics

https://marketplace.tf/items/1162;5;u3005

Most two recent sales:

March 22, 2019 sold for $35.00 / 1.80 = 19 keys

March 29, 2019 sold for $44.00 / 1.79 = 25

Current sellers at 20 keys on classifieds, going with 19 keys for this mini.

https://gyazo.com/8b8f80e4fd200807ccb2fdc5694f002a

Fountain Flippin'

https://marketplace.tf/items/1107;5;u3005

March 2, 2019 sold for $19.99 / 1.79 = 11 keys

4 sellers in classifieds for ~10.6 keys. Safe to say this mini is still usable.

https://gyazo.com/95352a8fc6b5b2ba7ba5752a64a56d47

Hundkopf is still 9 keys.

3 keys in sweets is still 3 keys.

110 + 32 + 19 + 11 + 9 + 3 = 184 keys

EDIT: MINIS ON THIS HAVE MOST LIKELY CHANGED. However, after this sale, which was previously calculated at over 180 keys, the GE Pajamas was sold to scrap.tf. Therefore, this sale is ruled out.

Sale 2:

https://backpack.tf/profiles/76561198231082180#!/compare/1550620800/1550707200

Sold for Green Energy Hat of Cards + 22 keys

Green Energy Hat of Cards is being priced at ~70 keys.

This sale is a low outlier, as there are quickbuyers for around this price.

https://gyazo.com/962d6391454a6380660c8d00119b4e52

Sale 3:

https://backpack.tf/profiles/76561198026191038#!/compare/1551916800/1552176000

https://backpack.tf/profiles/76561198309178418#!/compare/1551830400/1552089600

Untraceable/Bulk sale

Sale 4:

https://backpack.tf/profiles/76561198169109536#!/compare/1554940800/1555027200

https://backpack.tf/profiles/76561198073715461#!/compare/1554940800/1555027200

Sold for Strange Pro KS Festive Medi Gun, Strange Pro KS Aus. Blutsauger, Strange Invis Watch, Midnight Whirldwind Skullcracker, Burly Beast, Giger Counter, 100 keys

SF Pro Medi Gun:

https://marketplace.tf/items/663;11;kt-3

Sales around 30 keys and some weird highs and low

https://gyazo.com/2e30b7c102447aba80a1ec8d8eee8f1b

Bot.tf has a sale for 25, going with 25.

S. Pro Aus Blutsauger:

https://gyazo.com/a4ff48c35f314b84a4b4104387b3699d

7 keys gucci gang

Midnight Skullcracker

https://gyazo.com/987e71f692b985debd3c52ef08cf581c

5 keys gucci gang

Strange Invis Watch is 5 keys.

Giger Counter is 2 keys.

Burly Beast is 7 keys.

100 keys is 100 keys.

This makes Sale 4 around 150 keys.

//

I am going with a price of 150 keys.

Thank you RodneyCopperBottom for providing another sale here,

https://backpack.tf/suggestion/5c8d26b9678072154d3c3e18

Thank you Foamy for correcting my mistake here,

https://backpack.tf/suggestion/5cb2d2c4d38172250552d9b0

JUST END THE PAIN

https://gyazo.com/3f421abc75814c0871d5e50228a734a8