I have no qualms about buying things for cheap and selling them for a profit. I never low ball someone for their item for sale, and I never rip anyone off when I sell it. I also never feel bad if I get a good deal on something and can sell it for a profit to offset the costs of my spending on certain items like audio equipment and other things. My lifestyle and profession are a bit different than most here, and as such I, at times, need to find creative ways to earn some additional money.
I respect and admire JPelg's attitude about selling things to others for a profit, but the problem enters when one expects others to do what you do. Without knowing the reason(s) that person did such a thing, it is only speculation anyway. How would you feel if you found out his father died and he had to sell his audio stuff to pay for a funeral? Bad I assume. I can only control what I do, and I try to never expect others to treat me with the same treatment I show them. I treat others as I would want to be treated, but never put a thought into expecting the same treatment! I try to be very appreciative for what I receive, making sure to be thankful for whatever it is, but when someone takes without being thankful or appreciative, I don't let it get to me.
The one thing I do feel is somewhat indebted to the many people here who have been so helpful with advice, have given so much of their time to help others and myself. For that reason I will generally give them a better deal on something I am selling because of that. Whether they can afford it or not I don't care. As a small gesture I gave a $16 tube to Hirsch to say thanks for letting my father and I listen to his stuff and for setting it all up for us. I could have accepted the $16 for the tube, but it was my way of saying thanks. It also helped him match up a pair of tubes he didn't have before, and I was happy to do it and would do it again given the chance!! A wise man once said it is better to give than receive!! Far too often we clench our fists and cling to what we have and miss the incredible blessing it is to give to someone else.