No sellers, Buyer @19.5

#1 11 keys + Pro KS Big Kill (VV + FH) [17.5] = 28.5 =~29 keys

https://backpack.tf/profiles/76561198057187148#!/compare/1777075200/1777852800

#2 Unclear

https://backpack.tf/profiles/76561198880981513#!/compare/1771459200/1772236800

https://backpack.tf/profiles/76561198328282971#!/compare/1772064000/1772150400

Mini for FH+VV Big Kill:

Don't feel comfortable taking a normal Pro KS sale for this considering this is arguably the second highest tier of pro ks combo, will find specific combo sales:

#1 Bulk for Aussie Tomi

https://backpack.tf/profiles/76561198931183390#!/compare/1776297600/1776384000

#2 18 keys pure

https://backpack.tf/profiles/76561198269303436#!/compare/1774828800/1774915200

Seller @17 keys

https://imgur.com/a/SpjiJTJ

Taking 17-18 keys

Only 2 sales at all, only 1 makes sense. Rounding 28.5 to 29 per rules for non-pure sales of this value