Please share your absurd experiences on Danggeun Market.

Recently, a friend tried to sell something through 당근마켓 and had an interesting experience. The person wanting to buy kept asking for a lower price, and when my friend said they couldn't lower it any further, the buyer got angry and said that with that price, they couldn't buy the item and resell it for a profit. I've heard a lot about how there are many people looking to resell items, especially those targeting free goods. Have you ever had a similar experience? If you have any absurd or frustrating experiences from 당근마켓, please share them. I would like to exchange tips on how to be cautious through various stories.