I Work For a Business and My Sale Prices Vary From One Person to Another According to How Much The Customer Bargains. Is This Regarded As Deceit?

Question

What you should do is not to increase the value of the item too more than its market value. There is nothing wrong with lowering the price and making it less than the market value for some customers; rather what is forbidden is increasing it and making it higher than its market value for some customers especially if the purchaser is unaware of the market prices.