6 keys were added to the 2 buds for the C9 modest - http://backpack.tf/id/76561198057883290?time=1379833200

But I guess original suggestion on the belt would make that 7, 7.5 if it was offered, so your range is probably still good

This was on the market for a good month:

http://www.tf2outpost.com/trade/13960184

Best offers of flies trophy + 2 ~7.5; scorching mancer ~7

6.6 seems a tad bit low. Best range might really be 7-7.9. But this is pretty close and there is that sale at 6.6.