Well as to this being the most expensive skin, yes it is the most expensive skin sold, There are some skins such as StatTrak Karambit | Slaughter FN where there is 1-0 of these in the world same case with stattrak factory new nights, so ya any way
Well I spend about $15 on keys and got all blues. Realised how much of a money waster the system was and tried a different approach.
My system has earned me about $20.00 USD so far and I bought a bunch of $2.00 skins. My best is probably a 95% blue AWP - Electric Hive (FT)
At the moment I've got $13 in the steam wallet and goimg to save for a knife.