The other suggestion just really isn't cutting it with no sales listed and only buyers.

Given the tiny market and two sales at 7 and 8, plus buyers/offers at 7 up through 8, this range seems correct for now.

If you see any other sales, please post them.

Sales

Sold for 8 keys - http://www.tf2outpost.com/trade/26350960

Purchased for 7 keys (bp shows 32 keys yesterday, 25 today + black rose) - http://www.tf2outpost.com/trade/26585931 , http://backpack.tf/profiles/76561198090737788

Offers

Offered 2 buds - http://www.tf2outpost.com/trade/26587852

Offered 8 keys - http://www.tf2outpost.com/trade/26381374

Offered 7 keys - http://www.tf2outpost.com/trade/26356157

Buyers

Buying for 7 Gun Mettle Keys - http://www.tf2outpost.com/trade/26554741

Classifieds - None for less than 9, the buyer at 7 was successful.

http://backpack.tf/classifieds?item=Black+Rose&quality=6&tradable=1&craftable=1

16 sellers on Outpost (Non-killstreaks and craftable/tradeable)

http://www.tf2outpost.com/search/251557039,1