To encourage bulk orders, you can setup volume discounts on products. To get started, you will need to setup quantity tables and specify the price per item at that quantity.
For example, if you are selling a product individually for $20, you can set a Quantity of 10 and a Price Per Item of $19.00. So if someone purchases 10 items, their total bill would be $19 x 10 = $190, instead of $20 x 10 = $200. You can then setup multiple quantities and increase the discount.
Once you have added your volume discounts, it will automatically show up on the product page.