Are you guys looking for the best rates in the market when deciding to buy/sell Bitcoin or you're bond with the certain exchanges where you have an account?
The exchange service you will use to trade will usually be very close to each other in terms of price, so there is no special service to sell at a higher price. The most important factor to consider when choosing an Exchange service is the high transaction volume, because prices with low transaction volume are too late and may react abnormally. I usually use Binance, Binance Dex and Switcheo exhange services.