Instead of vendoring items I have been placing green and blue items I can't use in the guild store for guildies to purchase. I don't change the default value the game places on the item. However, I do see a few guildies significantly mark up the price on items. I really don't have an interest in making much money in game...just enough to cover repairs and and an occasional desired upgrade. So, the question is what's a fair price to charge for items? I'm perfectly ok to keep doing things the way I have in game.