seller&buyer: https://gyazo.com/1b2fb8d38a5ba43448f09cdc78b8b409

sale 1

https://backpack.tf/profiles/76561198068986721#!/compare/1530403200/1530489600

https://backpack.tf/profiles/76561198396499936#!/compare/1530316800/1530489600

bulk for Flaming Lantern Brainiac Hairpiece, invalid

sale 2

https://backpack.tf/profiles/76561198054004552#!/compare/1531008000/1531094400

https://backpack.tf/profiles/76561198101092551#!/compare/1529971200/1531180800

sold for a Haunted Phantasm Jr Pithy Professional(100, indate)

sale 3

https://backpack.tf/profiles/76561198054004552#!/compare/1530921600/1531008000

https://backpack.tf/profiles/76561198396499936#!/compare/1530921600/1531008000

bulk for beams federal, invalid

sale 4

https://backpack.tf/profiles/76561198101092551#!/compare/1532736000/1532822400

https://backpack.tf/profiles/76561198073823378#!/compare/1532736000/1532822400

sold for 75 pure keys

sale 5

https://backpack.tf/profiles/76561198073823378#!/compare/1533254400/1533340800

https://backpack.tf/profiles/76561198396499936#!/compare/1533254400/1533340800

sold for purple confetti beak(50, outdate) + Morning Glory Slick Cut(49.5, outdate)

mini for purple confetti:

https://backpack.tf/profiles/76561198396499936#!/compare/1532217600/1532304000

sold for pro ks aussie medigun(40) + two unusual taunt(seller at 16)

easy caps 50

seller screenshot:

https://gyazo.com/6fab5547d15772cf36bc3ef4026c5b10

https://gyazo.com/c814f4c9ae6d7353d9821eacefbeeaeb

mini for the morning glory slick cut:

https://backpack.tf/profiles/76561198232041512#!/compare/1532217600/1532304000

slick cut sold for K-watt slick cut(outdate, mini at 14) + PE hotrod(30.5, indate) + about 4 keys in items

14+30.5+4=48.5

mini for the K-watt slick cut:

https://backpack.tf/profiles/76561198126693824#!/compare/1533081600/1533168000

sold with 15 pure keys + 15 ref for a GE mirror(29.5, new suggestion)

29.5-15.5=14

sum=purple confetti beak(50) + morning glory slick cut(48.5)

round to 99

we got 75, 99, 100 here

take 75~100 as range