I think I will not sell a lot of coins but when I sold some coins, I sold them in the highest price, and bought or sold them for cash locally in my hometown. A few years ago it was much easier and more people were buying but recently it looked  there are not many people who want to buy at a higher price. Localbitcoin is where I use cash trading and Bittylicious can also be used for fast transfers to my transaction but I use Local bitcoin as a good choice in selling.