These are the verified sales since the last price update

http://www.tf2outpost.com/trade/15833582 45 Keys

http://www.tf2outpost.com/trade/14997529 Vivid Plasma Noble Amassment 2.9 to 3.7 buds with bp.tf suggesting 3.3 buds. 3.3 buds in unusuals equals 3 buds pure.

Response from using Noble Amassment"

http://backpack.tf/stats/Unusual/Noble%20Amassment%20of%20Hats/Tradable/Craftable/16

It was updated on 7th of Dec, which is 3 months + 2-3 days (Check last blue dot, this also gives original price), so I think it can still be used."

I want to update this hat so that we can then update a few hats that are dependent on the price of this one getting updated. Luckily two pure purchases occurred since the last price update, so I just set the low/high at the two purchase prices.