I missed this thread back in October.

We don't have definitive numbers for any auto, because Artbox does not release that info. As Roz said, Jeff has good estimates based on the statistics he does for each set. He also has his own website with lots of info about many non-sport sets. The site isn't fully up-to-date, due to Jeff recently recovering from a lengthly illness.
http://www.nslists.com/jachlist.htmI can think of only one magazine that has a price guide, but honestly, it isn't that accurate. I've found the listed prices to be much higher than the going price on eBay. You can check our price guide for a general idea of a card's value and you can also do a completed items search on eBay for prices over the past 15 days.