This action for Apple’s Automator allows the user to archive a series of web pages as PDF documents in a given workflow. As of version 6.0, the heavy lifting is now done in a small commandline app called url2pdf, which is wrapped in an AppleScript-based action.
Download URLs as PDFs 6.0 (OS X Lion Compatible) is available for whatever price you see fit. Simply enter any US dollar amount you’d like and click the “Download” button to begin your PayPal transaction. Yes, zero dollars is okay, too, but remember how much work goes into creating and maintaining software like this.
Source code for URL2PDF and Download URLs as PDFs is available on Github.