MasterP said:
Achievement Item: Not tradable or craftable
You either bought an Item and gained it that way, was gifted the item in a server, or went through enough scout achievements to get the “auto item”.
It prevents people from buying tf2 accounts and rushing though the achievement to get item drops then crafting/selling for cash.
Speaking of which, I was nearly tempted to sell my Purple Scotsman’s Hat to a guy said he would pay 15 dollars for it. If there was any guarantee the money would reach me and not fail in paypal somewhere I would have but I was mr. skeptical.