Trying again, let me know if anything should be changed.

Dropping on basis of unsolds and sales. All proof is of clean unusuals.

Scrap.tf has had an unsold for 11 keys 5.11 ref since April.

https://backpack.tf/item/2235109445

http://i.imgur.com/S5fOCn0.png

Last person who owned it bought it from scrap.tf and then resold it back to scrap.tf as a quicksell, invalid.

Sale last Valentine's Day in bulk, invalid

https://backpack.tf/profiles/76561198155326941#!/compare/1487030400/1487116800

Last valid sale was also on Valentine's day for 9 keys pure

https://backpack.tf/profiles/76561198142967390#!/compare/1487030400/1487116800

Sale at 8 keys pure

http://backpack.tf/item/2610291638

http://backpack.tf/profiles/76561198312151880#!/compare/1489363200/1489449600

The current owner has listed it at 13 keys and has been unsold for two months.

Next one is invalid, sold in bulk.

https://backpack.tf/item/2610291638

http://backpack.tf/profiles/76561198192602363#!/compare/1488844800/1488931200

The current owner has also listed it at 13 keys and has also been unsold for two months.

Sale last Valentine's Day in bulk, invalid

https://backpack.tf/profiles/76561198155326941#!/compare/1487030400/1487116800

No other sellers on tf2outpost.com or on backpack.tf, settling at 11 keys because the 8 and 9 key solds might have been quicksells.