Please read all before voting. Green Black Hole worth MORE than Burning??? #screwlogic. I'm sorry, but this is OP man.

My Evil Proof:

http://www.tf2outpost.com/trade/14324267 - B/O of 4.

http://www.tf2outpost.com/trade/13680801 - B/O of 4, but seems to want around 3.4 - 3.6 in Pure.

http://www.tf2outpost.com/trade/14118173 --> http://www.tf2outpost.com/trade/14329846

B/O of 3.5 Sold for a Planets Modest (~2.8) Not a quicksale B/O based on other sales...

http://www.tf2outpost.com/trade/14041339 -> http://www.tf2outpost.com/trade/14118271

B/O of 4. Sold for a Time Warp Noir (No value)

http://www.tf2outpost.com/trade/13814641 --> http://www.tf2outpost.com/trade/14058983

B/O of 3.5, Sold for a Stormy Juju (~3.5)

CONCLUSION:

I am NOT seeing Anything Higher than 4. Low Range = 2.8 because of a sale. High Range = 4 because of Multiple B/Os under the current high range.