Domo arigato, Mr. Roboto Mata o hima de. Domo arigato, Mr. Roboto Himitsu wo shiri tai. You're wondering who I am, (Secret secret, I've got a secret). Machine or mannequin, (Secret secret, I've got a secret). With parts made in Japan, (Secret secret, I've got a secret). I am the modern man.

http://www.tf2outpost.com/trade/26641028 - 8 Keys, 1 sold

http://backpack.tf/profiles/76561198003935476?time=1441177200 - Before

http://backpack.tf/profiles/76561198003935476?time=1441263600 - After (8 new tradeable keys. Sort by Time)

http://steamcommunity.com/market/listings/440/RoBro%203000%20Strangifier

SCM: Lowest available is $19.96. Last sold was $19.98 on September 4th.

Keys on the SCM were ~$2.44 on the 4th.

$19.98/$2.44 = ~8.2 Keys

Only other one for sale is here: http://www.tf2outpost.com/trade/26503502

Unsold at 10.5 Keys

Blah blah blah rare strangifier from series #1 blah blah