tfw you spook the uncraft market and you're considered invalid

Not a lot of sellers at 5... or 6 for that matter. Counter to http://backpack.tf/vote/id/56eca5c0b98d889e0875a04e

http://puu.sh/nMc6G.png classifieds

yoinking proof from other suggestion

"Sellers at 5 keys

http://www.tf2outpost.com/trade/27967150

Sellers at 5 keys + 14 ref

http://www.tf2outpost.com/trade/27966693

Sellers at 5-6 keys

http://www.tf2outpost.com/trade/27957109

Sellers at 6 keys

http://www.tf2outpost.com/trade/27948928

http://www.tf2outpost.com/trade/27935606

http://www.tf2outpost.com/trade/27969016

http://www.tf2outpost.com/trade/27966779

http://www.tf2outpost.com/trade/27946989

Steam market also suggests that the value is between 4-5 keys (~$11). Some even sold under $10

http://steamcommunity.com/market/listings/440/Treasure%20Hat "

Best to go with 6 flat as 5 isn't a common trading point.