Nothing wrong with saving money and selling stuff for as much as possible. I factor in time when I'm selling/buying stuff. My only day to work on stuff like that is Saturday and about 1 hr after the kids are in bed during the week. My time is valuable so I hate dealing with tire kickers and low ballers when selling and when I'm buying something I'll give a number that I'll pay and that's it, I hate negotiation.
Here's a story about local buyers. I was selling a radial arm saw for $100. A guys tells me he's interested and wants to see it. So he comes by and starts measuring it and looking it over really closely. I thought, good he's going to buy it. After 15 minutes he said goodbye and leaves. Turns out he just needed to measure it so he could drive a hour away to pick up a free one! That irritated me!