Mega Strike Taunt: Second Rate Sorcery - Resuggesting

Team 1 (layad)

Sale 1 : Sold Strange Killstreak Rocket Launcher with Excorism (~2 keys) and https://backpack.tf/item/1543133018 (~1 key) → ~3 keys; countered by buyers

https://backpack.tf/profiles/76561198136977926#!/compare/1532736000/1532822400

https://backpack.tf/profiles/76561198195552319#!/compare/1532736000/1532822400

Sale 2 : Sold for 5 keys

https://backpack.tf/profiles/76561198095305922#!/compare/1529280000/1529798400

https://backpack.tf/profiles/76561198064926985#!/compare/1529366400/1529452800

Sale 3 : Sold for 72 Taunt buy a life (6) + 2 keys Taking 8 keys

https://backpack.tf/profiles/76561198276776187#!/compare/1531958400/1532131200

Sale 4: Sold for 13.90 USD on mp.tf; 1 key =1.96 USD → 7 keys

https://marketplace.tf/items/30816;5;u3010

Sale 5: Unusualified a taunt

https://backpack.tf/profiles/76561198032474223#!/compare/1528934400/1529107200

https://backpack.tf/profiles/76561198259733876#!/compare/1528761600/1528934400

Sale 6 : Untraceable prob SCM

https://backpack.tf/profiles/76561198004610923#!/compare/1530057600/1530230400

https://backpack.tf/profiles/76561198354749709#!/compare/1528588800/1530489600

Sale 7 : Untraceable

https://backpack.tf/profiles/76561198251433444#!/compare/1530489600/1530835200

https://backpack.tf/profiles/76561198072073083#!/compare/1530489600/1533168000

Sale 8 : Untraceable

https://backpack.tf/profiles/76561198137036715#!/compare/1529798400/1529884800

Sale 9 : Untraceable; IDs of the keys do not match

https://backpack.tf/profiles/76561198123569966#!/compare/1530230400/1531267200

https://backpack.tf/profiles/76561198088991722#!/compare/1517616000/1532131200

Sale 10 : Untraceable, likely SCM

https://backpack.tf/profiles/76561198106176871#!/compare/1508976000/1532390400

https://backpack.tf/profiles/76561198053048202#!/compare/1531267200/1532736000

Sale 11 : Untraceable

https://backpack.tf/profiles/76561198085594975#!/compare/1526688000/1528502400

Sale 12 : Untraceable

https://backpack.tf/profiles/76561198026561374#!/compare/1531785600/1531872000

https://backpack.tf/profiles/76561198011321852#!/compare/1531785600/1531872000

Sale 13 : Untraceable / Bulk / Cashout

https://backpack.tf/profiles/76561198133902802#!/compare/1532044800/1532476800

https://backpack.tf/profiles/76561198279367812#!/compare/1532390400/1532736000

Sale 14 : Untraceable

https://backpack.tf/profiles/76561198098480978#!/compare/1530489600/1532822400

https://backpack.tf/profiles/76561198130267444#!/compare/1530230400/1530921600

Sale 15 : Untraceable

https://backpack.tf/profiles/76561198192872987#!/compare/1527811200/1528243200

https://backpack.tf/profiles/76561198089449160#!/compare/1528070400/1528156800

Sale 16 : Untraceable

https://backpack.tf/profiles/76561198355284235#!/compare/1529884800/1533427200

Young seller at 6 keys. Buyers at 4.X https://i.imgur.com/CqIxUdu.png

Sales at: 5, 7, 8.

Suggesting range from 5 to 7 as advised by mindacos. Sale at 8 is a bit problematic.