ALL sales, whether real world or in a game, are fueled by supply and demand. Do I have what you want at a price you're WILLING to pay? On my world, HQ darksteel nuggets are selling for 8000-9000g... I sell mine for 5000. But I sell mine in stacks of 99. Same with hippo leather, HQ and stacks of 99. Gold nuggets, twinthread, growth gamma (nobody wants stacks of Hq vanya silk), my target market is other volume crafters, not Joe Lalafel who's crafting a wooden sword because it's dangerous to go alone (a little Zelda homage there). And many times I'm selling to the person who breaks down the stacks and resells them in quantities of 5 or 10. I did it when I was starting out. And if someone undercuts you by a gil (which is a doosh thing to do), just roll with it. If your priced fairly, you'll sell later tonight or tomorrow. Just remember, it's nothing personal, and nobody's out to get you. It's a game, have fun with it.