I'm just using the ebay rss feeds
If you choose to expire the posts at the end of an auction make sure you have a dirty great adsense block on your 404 page.
Yeah, that's a good tip there that a lot of people overlook.
So when you have an auto site as described, your new content is creating new pages that get indexed (hopefully) obviously. Is there any opinion on whether its better to just have a few links at the base of each page to the sites you are trying to SEO, or do you attach links to every new page so that you have links on all the indexed pages? IE, attach links to each wordpress post VS a few links in your blogroll or what have you..
Doesn't matter if you put your links in the sidebar in a blogroll or set it up to have them at the bottom of each post. I make a page and name it resources.php and put a call in the single.php of the wordpress theme with <?php include("resources.php");?>. I just put my links on the resources.php page and they'll show at the bottom of each new post. I like to do it this way so the links are with the content as opposed in a sidebar. Either way is probably fine though.