Sale 1:

Sold with Pro. KS Southern Hospitality for Miami Nights Coupe

http://www.tf2outpost.com/trade/28036232 - B/O of 11

Seller: http://backpack.tf/profiles/76561198149960496#!/compare/1462492800/1462752000

Buyer: http://backpack.tf/profiles/76561198113404155#!/compare/1462665600/1462752000

X = 11 (Capped by B/O)

Sale 2:

Sold for 8 keys + ~1 key in painted items

http://www.tf2outpost.com/trade/28269606 - B/O of 10

Seller: http://backpack.tf/profiles/76561198296809260#!/compare/1466294400/1466380800

Buyer: http://backpack.tf/profiles/76561198290166258#!/compare/1466294400/1466380800

X = 9

Sale 3:

Sold for 9 keys

http://www.tf2outpost.com/trade/28273065 - B/O of 9

Seller: http://backpack.tf/profiles/76561198290166258#!/compare/1466380800/1466467200

Buyer: http://backpack.tf/profiles/76561198050904212#!/compare/1466380800/1466467200

X = 9

Sale 4:

Sold for 9 keys

http://www.tf2outpost.com/trade/28288107 - Deleted B/O

Seller: http://backpack.tf/profiles/76561198027694776#!/compare/1466899200/1466985600

Buyer: http://backpack.tf/profiles/76561198219007213#!/compare/1466380800/1466985600

X = 9

No current sellers

Sales at:

9

9

9

11

The sales at 9 keys sold pretty quickly, it would probably be best to include 11 in the range here

Going with 9-11