Cheapest on classifieds is 9 ref

Lets do dis

Proof:

Sellers:

http://www.tf2outpost.com/trade/24085556 (1 key)

http://www.tf2outpost.com/trade/24129875 (1 key)

http://www.tf2outpost.com/trade/24117850 (2 keys)

http://www.tf2outpost.com/trade/24060636 (2 keys)

http://www.tf2outpost.com/trade/24082027 (1 key)

http://www.tf2outpost.com/trade/24051754 (2 keys)

http://www.tf2outpost.com/trade/24128974 (1 key)

http://www.tf2outpost.com/trade/24051536 (1 key)

http://www.tf2outpost.com/trade/24139600 (1 key)

http://www.tf2outpost.com/trade/24143827 (2 keys unless bp.tf gets a price :))

http://www.tf2outpost.com/trade/24125499 (1 key)

http://www.tf2outpost.com/trade/24081657 (1 key)

http://www.tf2outpost.com/trade/24145499 (9 ref) !!!!!!!!!!!

Ok there are lots more sellers. But most are pretty much 1 key. And you know what they say.... Solds are more important

Solds:

http://www.tf2outpost.com/trade/24085017 (sold in 2 days for 6 ref. Quicksell)

http://www.tf2outpost.com/trade/24051378 (not sure but could of sold with some curb's for a brother hood of arms? Classifing it as 3.5 ref? I wouldnt count this as a sale, also it sold in less then a day, in actually 1 hour so..)

http://www.tf2outpost.com/trade/24073907 (if you take the price of paint, half it like normal its 2.5 ref. Hes selling it for a key. A key is 13.33 ref. So that basically sold for 11.33 ref?)

http://www.tf2outpost.com/trade/24089671 (sold for 12 ref)

http://steamcommunity.com/market/listings/440/Strange%20Sleeveless%20in%20Siberia Cheapest is $1.69. Minus the tax its $1.43. According to tf2calculator 1.43 is 0.6 keys which is 8.7 ref. Rounded up to 9.

The most recent sold was 20 minutes ago (on scm) for 1.50. Generically a quicksell. If we counted it, it would be 1.275 which again according to tf2calculator is still 7.7 ref. Rounded up to 8.

This suggestion might not be enough. Considering not many sales.

2 solds are in the range (The 9 ref seller is in the range and the scm and one sold for 11.33 and 1 sold for 12)