As of next week, GoDataFeed will make the Google Base 'Condition' attribute a required field to comply with Google Base's requirements, which go into effect June 30th.
So make sure to include the 'condition' attribute for all your items, if you haven't already. The condition attribute is one of the three values: new, used or refurbished.
You can also read more about this change on Google Base's Blog
Not On Google Base?
If you're looking to expand product exposure, you should definitely be submitting your product feeds to Google Base; it's a free shopping site and it can bring you significant quality traffic.
To sign up with Google Base, visit our Supported Feeds Page.