I have some kind of coin in my eth wallet, but I do not have ethereum to be my coin sale fee
how can i sell my coin without fee?
Selling coins/tokens without a transaction fee or gas is not possible.
But there are many ways to have an eth for making transaction, when i was a beginner in trading coins and tokens i use to ask help for my friends who are somewhat veteran on this league, they give me 0.005 Eth for gas and pay it after my token get sold.
You can also send money directly on your Ethwallet by Shape shift.