Please read these sentences below.
1. We buy and sell used things/goods/items at flea markets.
2. We sell and buy used things/goods/items at flea markets.
Which sounds more natural, #1 or #2?
Thank you very much.
You would have to buy something to be able to sell it, so "buy and sell" is more logical.
(Unless you made it yourself, found it somewhere or got it for free)
(I'm not a teacher or a native English speaker. I'm just trying to help...)
We say fish and chips rather than chips and fish, but chips are not dependent on fish. I think it's probably a matter of habit than logic.