I've read all the help threads I cound find, and still can't figure out how to auto-price my shop. Can anyone help me?

You need a gold account to be able to autoprice your shop, that's why you don't see the option :)

With a basic account you can't the Autopricer is a feature exclusively for Gold Account users. :)

Oh bummer and I even had that free gold account for a week and missed the achievement. Sigh... so sad. Thanks much for your help.