History of the 3 keys (the 'Obtained Together' section that is 4th from the top in the comparison):
https://backpack.tf/item/5204996783 (this one goes from Buyer -> Seller -> Someone else, but the current holder is unrelated to this sale so it's fine)
3 Sold @ 3 keys each
Sale 1:
2 sold @ 6 keys
https://backpack.tf/profiles/76561197969564166#!/compare/1536278400/1536364800
Histories of the 2 sold:
https://backpack.tf/item/2094648498
https://backpack.tf/item/2443717669
Seller -> Buyer
Histories of the 6 keys (the only 'Obtained Together' section containing keys in the comparion):
https://backpack.tf/item/1844450022
https://backpack.tf/item/6625023597
https://backpack.tf/item/4824904184
https://backpack.tf/item/7011258494
https://backpack.tf/item/7039065237
https://backpack.tf/item/6919510365
Buyer -> Seller
Sale 2:
1 Sold @ 3 keys + 0.44 ref
https://backpack.tf/profiles/76561198069269987#!/compare/1540944000/1541030400
History of 1 sold:
https://backpack.tf/item/2203024335
Seller -> Buyer
History of the 3 keys (the 'Obtained Together' section that is 4th from the top in the comparison):
https://backpack.tf/item/5204996783 (this one goes from Buyer -> Seller -> Someone else, but the current holder is unrelated to this sale so it's fine)
https://backpack.tf/item/7037556830
https://backpack.tf/item/7035392177
History of the rec and scrap - https://backpack.tf/item/7288748857, https://backpack.tf/item/7286847610
(The reclaimed goes from Buyer -> Seller -> Someone else -> missing, but that's also unrelated to the sale)
can't refresh a unique unless you make the range smaller, since this doesn't have a range ------> close please
Otherwise good suggestion, keep it up
Goddamit.... Every suggestion I make has something wrong with it :( closing now...