Of course. I long developed that inner rule: whenever i am going to execute any business transaction and know i will not feel guilty as a result, i am going to be taken advantage of and should not do it.
Besides which, economics is all based on the fact that two parties in a trade can both win because they want different things. Eg, you have a surplus of oranges, I have a surplus of apples. I value my first apple highly (I like apples!) but my ten thousandth apple is nearly worthless to me. I'd happily trade that last apple for a tenth of an orange. And you'd gladly trade your last orange for a tenth of an apple. We trade some of our fruit 1:1 and we both got a deal 10x better than what we'd accept.