this discrepancy is called Ask and Bid. that's where traders make money. When investing in the stock market there is also a variable, when buying or selling in banks as well. analyze it

I don't understand why in selling the USDT is more expensive but in buying the prices should be almost equal on both sides. So the one who sells USDT and I want to buy earns more because he sells it expensive and the one who buys it earns less.xdddd