I hope you know not to buy cosmetics in the ingame store. I suggest buying 1 key from the ingame store and the rest of the keys in the marketplace... If i remember correctly you won 20£ with that and a bit of luck you can get an unusual, altho i dont recomend. Id try to find allclass cosmetics like: hong kong cone, bruisers bandana, graybans... also taunts sound like a good investment. Idk if you trade or not, if yes try finding an all class unusual, and dont buy weapon skins.