Updating : 2 months old , yesterday i managed to buy-resell one of this hat . .

found one duped (out of our clean prices ) going to 5.5-6 buds http://www.tf2outpost.com/trade/7464250 http://backpack.tf/item/280921951

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i added this seller and offered him 6 in pure or 7 in offer refused because he won't discuss it out of his trade

http://www.tf2outpost.com/trade/9125515

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also contacted this http://www.tf2outpost.com/trade/8319534 but he said i have offers 6 pure already no need it .. offered him

Vivid Drill's Hat, Blizz Noble, lvl 72 max's head and ts bills+baf bills ~ 7.5

also offered him vid drill + max + 2 buds + bill ~ 7.3

said sorry have better than those like secret chief 11.2 buds , boom i just ignored him a bit 11-12 too much :3

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searched on the old trades .... found a guy have one and then trade completed

payment was vid drill + max + 3 colored bills + bud + 6 keys ~ 7.3 ~ 6.8 in pure

buyer http://steamcommunity.com/profiles/76561198070255228/

seller http://www.tf2outpost.com/trade/8868452

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i'd say 5.8 a bit low no body willing to go with this , bump it to 6.3 and from the cheapest one i found was like 6.8 in pure so respecting new value 6.3-6.8