"What's your best Price?"

The one's I hate are like a couple I had recently.
1. Had an item on the c-list, listed for $125, guy contact's me with, Will you take $65?
I know people want a deal, and want to haggle, but when they offer you half it just ticks me off.
2. Item number two, was only asking $20 and that was a good price for the item. They still contact me with, $15 and I'll come get it today. IT'S $20 bucks ! It's not that much, and they still have to offer you less. Told him no, sold it for $20 the next day to someone who was more than happy to pay that price.