Consider another approach that will still make the seller just as happy, but will also do more with the search engines. Instead of a static web site for each listing, use a blog. With a blog for each listing, you can:
There are a number of blogging platforms out there that will work for this purpose, but probably not the free ones. For under $100/year for unlimited blogs, TypePad.com (Buy Direct) is a good choice. The learning curve isn't too great and standard formatting and color choices are varied.
For more formatting and customization options, the free Wordpress platform is used by most of the top bloggers in the world. It's a bit more to learn, but amazing things can be accomplished. The best way to do this for most of us is to set up on a host that provides one-click Wordpress installation, such as Yahoo.com (Buy Direct). For a very small monthly cost, you'll get unlimited Wordpress blogs hosted with very easy installation of the files. There's an added advantage to going this route, in that you can also combine the blogs with normal static web page content for a listing display site. Read about The Ultimate Internet Listing Strategy here.

