What do I need to sell NFA keys?

Upload your loader (a Windows .exe) with the format of your keys, then add keys per tier of account hours. Staff review every loader version before buyers can run it, the official store’s included; a new version waits for review while the approved one keeps running. Every key must fit the format and is sold once on the whole marketplace. A key the buyer reports with no login on record is replaced from your stock; with none left you have 12 hours to restock before the buyer is refunded. Dead keys and the same Steam account sold twice count against you, per upload batch. With a login recorded and no warranty, the sale completes and you are paid at once.