Needs a bit of a raise...

Sales

Sale 1: Sold at 33 keys pure

http://backpack.tf/profiles/76561198072793553?time=1438153200

http://backpack.tf/profiles/76561198072793553?time=1438585200

Sale 2: Sold at 33 keys pure

http://backpack.tf/profiles/76561198099492291?time=1438239600

http://backpack.tf/profiles/76561198099492291?time=1438326000

I included the buyer's link since it was a bit hard to find the number of keys

http://backpack.tf/profiles/76561198131339709?time=1438239600

http://backpack.tf/profiles/76561198131339709?time=1438326000

Sale 3: Sold at 34 keys pure

http://postimg.org/image/mwdonxzbn/

No sellers at all (that I could find) selling below 33 keys pure (except a guy that had a trade ban)...

Buyers

Classfields: http://postimg.org/image/eo99xii97/ and http://postimg.org/image/brhvnbh0j/

http://www.tf2outpost.com/trade/25778647 - 32 keys 11 ref

http://www.tf2outpost.com/trade/23695822 - 32 keys 9 ref

http://www.tf2outpost.com/trade/26674514 - 32 keys

http://www.tf2outpost.com/trade/26421909 - 32 keys

There are enough buyers at or over backpack.tf price to show this needs a raise in price.

Any additional proof/counter-proof or constructive critisism is welcome.

Thanks for reading and have a nice day.