I recently created a database search utility that allows you to look up the ListPrice/MSRP of any Cisco product. Helpful if you are putting together budgetary numbers or just curious what something costs, and don't feel like searching through a huge Excel file.
You can access the tool here
There is also a secondary tool on the page that shows you the compatibility of most Cisco interface modules with the Cisco 1800, 2800 and 3800 series router platforms.
You can access the tool here
There is also a secondary tool on the page that shows you the compatibility of most Cisco interface modules with the Cisco 1800, 2800 and 3800 series router platforms.