The Sale:

Sold for Black Rose (Mini at 57.5 below) + 3 keys

Seller: https://backpack.tf/profiles/76561198004952793#!/compare/1588723200/1588809600

Buyer: https://backpack.tf/profiles/76561198403182852#!/compare/1588723200/1588809600

https://backpack.tf/item/7956912776

https://bot.tf/stats/listings/MQ0QPW3Q - B/O of 99

61 keys

Marketplace Sales:

https://marketplace.tf/items/tf2/514;5;u57

$100, Feb 13th

https://backpack.tf/item/7956427996

https://bot.tf/stats/listings/MLR37K7O - No B/O

http://manic.tf/keyprice?at=2020-02-13&price=100 - $100 / $1.75 = 57.14 keys

Rounds to 57 keys

Black Rose Mini: (should be fine to use killstreak/spec ks)

Sale 1:

Sold for 59 keys + ~1 key in metal

Seller: https://backpack.tf/profiles/76561198382654640#!/compare/1584489600/1584576000

Buyer: https://backpack.tf/profiles/76561198134731371#!/compare/1584576000/1584662400

60 keys

Sale 2:

Sold for 55 keys

Seller: https://backpack.tf/profiles/76561198021055079#!/compare/1586563200/1586649600

Buyer: https://backpack.tf/profiles/76561198103378918#!/compare/1586563200/1587427200

https://i.imgur.com/OXzqu10.png

Taking 55-60.

Probably viable for a suggestion, I looked into all sales within the last 2 months, except for pro.ks copies and marketplace/scm. Feel free to do the easy bit and take over.

Other Sales:

https://backpack.tf/item/7956102835 - GAMBLED

Sellers:

https://i.imgur.com/dq8DcLb.png

https://backpack.tf/item/7956102835 - 69 keys

Sales at:

57

61

Taking 57-61.