I think that's a great sentiment, but there's a market for second hand goods. People need every cent in this economy and if someone is able to make a fair deal where both sides find the terms acceptable it's understandable to take whatever you can get out of the transaction. Not everyone with an extra dresser is rolling in cash and jumping into pools of gold. So long as they're not scamming people, I think it's fine to charge a reasonable amount, even if it's for an item they technically don't need anymore. If people can afford to give their items away that's obviously preferable, but I don't hold it against anyone if they want something in exchange.