lets make it a nicer range, with proof ofcourse

http://www.tf2outpost.com/trade/11502797 willing buyer for 1 ref

http://www.tf2outpost.com/trade/11444982 had a willing buyer for 1 ref but he retracted (either seller didnt respond or he doesnt want it anymore)

http://www.tf2outpost.com/trade/11232308 1 ref offer (three rec)

http://www.tf2outpost.com/trade/11518853 willing buyer for 1 ref (after about 2 hours)

http://www.tf2outpost.com/trade/11388703 sold for 1 ref (item history) and has a willing buyer at 1 ref (didnt get it, item was already sold i guess)

http://www.tf2outpost.com/trade/11413419 4 days unbought at .55 (only buyer at .55)

so i am not totally sure about .55 in the range or not, as there was only 1 person offering .55 on every offer-for-atomizer trade on outpost, but he didnt get it, also saw plenty offers of .66-.77 so i think there is no need to have .55 in the range

used trade.tf to get some closed proof:

http://www.tf2outpost.com/trade/11492707 sold same day as posted at .66

http://www.tf2outpost.com/trade/11490893 was selling at .66 (that says trade.tf atleast) offer of 2 ref (typo?) (sold day it was put up)

http://www.tf2outpost.com/trade/11470944 sold 2 at .66 same day it was put up

http://www.tf2outpost.com/trade/11468300 sold at .66 in ~a day (or less)

looking at how fast they sold, i believe .66 can be removed from the range (.66 already looks like a quicksell)