Ubercart Volume (AKA Bulk) Pricing allows you to define discounts on buying a product in mass quantities directly from the product edit itself. For example, if you want to have 'Buy X products and you save Y dollars'. The module allows for unlimited amount of bulk entries per product
I've also added a optional cart message to notify a consumer about the possible savings if they buy more of said product in case they've missed out.
Configure at: /admin/store/settings/volume_pricing
I plan on eventually making this a configurable message as well.
All volume prices added to the product are then attached to the $node object upon product load. You then can control the display via your node--product.tpl.php
Cart message control is optional and located at /admin/store/settings/volume_pricing