The value of your inventory depends on its value on the market. To put things in perspective, the value of the currency used on Team Fortress 2 trades is in tiers. From metals the lowest among the currencies, to Keys, Bill’s hat, Earbud, and Max’s severed head TF2 currencies can be arranged according to their value, from the least to the highest. However, earbuds are often used as the highest form of currency as Max’s severed heads are often scarce.