Is there any way to handle volume based pricing in SF.com

Product --------- 1000 - 2000 --- 2000-3000
Product A             $1.00                $2.00

So when select the products, I would like to select a  volume pricing of the product.

Thank You
Ken

Is there any way to create volume based pricing in SF.com ? For examples

Product 

We have developed a custom composite application for Salesforce that is called PPI PayMover for Appforce that allows Salesforce users to accept credit cards as a method of payment process the payment within Salesforce and create customized transaction reports. The solution link to the marketplace is below:

http://www.salesforce.com/partners/solution-detail.jsp?id=a0030000000abSvAAI

I'm the primary developer of the PPI PayMover for Appexchange product and were looking for our first couple of trial users. We're going through Appexchange certification right now. As part of our trial period the solution is free with a merchant account from PPI. If you're interested please review the marketplace link and click on "More Info" to contact PPI.