Alright so... RELEASE THE PROOF!!! :)

http://backpack.tf/classifieds/search/id/51fff9644bd7b8840a000002/1

-6 sellers at 6.5-6.8 keys

-33 sellers at 7 keys (painted)

-16 sellers at 7 keys (unpainted)

That totals up to be 55 sellers from 6.5-7 keys, in classifieds alone. FYI, you can get any painted Bill's except white or black off classifieds for 7 keys. Including TS, Lime, Pink, Grey, Labcoat, etc.

Unsolds at high end:

http://www.tf2outpost.com/trade/12990375 2 weeks

http://www.tf2outpost.com/trade/13253883 1 week

http://www.tf2outpost.com/trade/13295830 1 week

http://www.tf2outpost.com/trade/13361134 5 days

http://www.tf2outpost.com/trade/13396711 4 days

http://www.tf2outpost.com/trade/13396315 4 days

http://www.tf2outpost.com/trade/13422396 3 days

http://www.tf2outpost.com/trade/13401878 3 days

http://www.tf2outpost.com/trade/13401409 3 days

http://www.tf2outpost.com/trade/13446296 2 days

http://www.tf2outpost.com/trade/13444372 2 days

http://www.tf2outpost.com/trade/13446302 2 days

http://www.tf2outpost.com/trade/13454921 2 days

http://www.tf2outpost.com/trade/13481581 1 day

http://www.tf2outpost.com/trade/13482462 1 day

http://www.tf2outpost.com/trade/13482194 1 day

http://www.tf2outpost.com/trade/13479230 1 day

http://www.tf2outpost.com/trade/13457818 1 day

http://www.tf2outpost.com/trade/13485004 22 hours

http://www.tf2outpost.com/trade/13487828 20 hours

http://www.tf2outpost.com/trade/13491195 15 hours

http://www.tf2outpost.com/trade/13493152 13 hours

http://www.tf2outpost.com/trade/13500589 8 hours

http://www.tf2outpost.com/trade/13506975 3 hours

http://www.tf2outpost.com/trade/13511101 1 hour

...and so on.

Unsolds/solds at lower than high end:

http://www.tf2outpost.com/trade/13510635 6 keys 3 ref, 2 hours

http://www.tf2outpost.com/trade/13364857 6 keys 4 ref, 5 days

http://www.tf2outpost.com/trade/13369808 6 keys 4 ref, 1 day

http://www.tf2outpost.com/trade/13511101 6 keys 4 ref, 3 hours

http://www.tf2outpost.com/trade/13498710 6 keys 4.66 ref, 9 hours

http://www.tf2outpost.com/trade/13501766 6 keys 5 ref, 7 hours

http://www.tf2outpost.com/trade/13505899 6 keys 5 ref, 4 hours

http://www.tf2outpost.com/trade/13510268 6 keys 5 ref, 1 hour

http://www.tf2outpost.com/trade/11744830 6 keys 5 ref, 1 month

http://www.tf2outpost.com/trade/13366440 6 keys 5.33 ref, 1 day

Sellers (mostly unsold) at high end with paint:

After Eight

http://www.tf2outpost.com/trade/13406334 (I used to own it, hehe)

Pink As Hell

http://www.tf2outpost.com/trade/13453031 (Used to own this too, hehe)

http://www.tf2outpost.com/trade/13484112

http://www.tf2outpost.com/trade/13505714

http://www.tf2outpost.com/trade/13466868

http://www.tf2outpost.com/trade/13461037 (sold)

http://www.tf2outpost.com/trade/13485157 (sold)

The Bitter Taste of Defeat and Lime

http://www.tf2outpost.com/trade/13074880 (poorly bumped)

http://www.tf2outpost.com/trade/13378067 (poorly bumped)

http://www.tf2outpost.com/trade/13491022

http://www.tf2outpost.com/trade/13507440

http://www.tf2outpost.com/trade/13497806 (sold)

http://www.tf2outpost.com/trade/13467810 (sold)

http://www.tf2outpost.com/trade/13459658 (sold)

Team Spirit

http://www.tf2outpost.com/trade/13495589 (6 keys 2 ref?)

http://www.tf2outpost.com/trade/13504850

http://www.tf2outpost.com/trade/13506426 (sold)

...and so on. You get the point. You can find higher tier paints at 7 keys :)

Successful buyers below market price (usually 6-6.5):

http://www.tf2outpost.com/trade/13251261 (yay me :D)

http://www.tf2outpost.com/trade/13447771

http://www.tf2outpost.com/trade/8222651

http://www.tf2outpost.com/trade/13073717

http://www.tf2outpost.com/trade/13470088

http://www.tf2outpost.com/trade/9904541

http://www.tf2outpost.com/trade/13406786

http://www.tf2outpost.com/trade/13433345

http://www.tf2outpost.com/trade/13276362

http://www.tf2outpost.com/trade/5148523

...and so on.

Conclusion:

Mass sellers at 7 keys. Some sellers at 6.6-6.9 keys. Some buyers at 6.5-7 keys. Most buyers at 6-6.5 keys. Also, you can get just about any paint at 7 keys. The high end proof is proven by the mass sellers. The low-medium end proof is proven by buyers and some sellers with a bonus that you can get Bill's with 1 key paints for 7 keys pretty easy. Before you say "hur durrr nut enuf proof 4 low ende 4 selerz", keep in mind it is the low end and most sellers try to avoid it. Currently, it is not even part of the Bill's price/range. Feel free to add proof or counterproof. Thanks.