It's not really possible to give a specific gold per stack price because it's really different per server. I would think that giving someone 15-25% off the price of what you'd sell on the AH, maybe even up to 40% if you are talking about a large amount that you can unload quickly and easily with no questions (aka, SAFELY). If someone wanted to agree to a daily or weekly amount and it makes it easier for you, isn't it worth it to reduce the price per stack? Basically as one of the members here put it, he's a wholesaler... and he said he discounts up to 50% off the AH price.