I do not know about you guys and about your localities but where i live here we do have exchangers or local agents that can arrange you any coin or currency you want for fiat in both directions, i mean you can buy or sell your coins for fiat face to face and the fee is usually very small that is why i really like this service and i usually use them and i have good contacts and relationship with few of such local exchangers.
This is the only way if you want to be "decentralized". First, you need to get into a centralized local exchange, get to know traders, and have their contact so you can pm them for private, face to face transactions. This has some risk as local exchange won't be the in-between your deal but also save you exchange fee.