Selling doge coins for bitcoins is not a good idea as i see.. The value of doge is pretty low. I suggest you if you if you got Dogecoins in a great quantity then you must have patience and stock your doge for proper time to exchange with bitcoins. 7months before the value of doge was 6satoshi now its value is around 70satoshi, so i suggest you to wait and sell when price is over 150satoshi or near to it that you can have some valuable btc amount in wallet. Selling for now is upto you but i suggest to stock doge for proper time or invest in any exchange that support invest like yobit.net. Its better then to exchange for a low amount of btc.
Why bumping a thread 2 years old?
I don't know why people are surprised asking in forum if anyone wants to sell, first of all is about the privacy maybe someone doesnt' want his IPs or something else to be logged into exchanges and/or doesn't want to give ID for verification to have lift limits.
And another reason can be trust, withdrawal process delays, fees etc.