What is it with the low ball offers on adverts? Rant

Had an item up for €10. Chap asked a load of questions about it, which I answered, and then offers €5. I said I wouldn’t go below 10 so he just withdrew.

Was DMing a chap a few weeks ago about a more expensive item. He asked for my lowest price. I said €500. Then he goes and puts an offer of €400.

Is it just me or does this practice wreck anyone else’s head?