My autopricer fails every time - feel like I've wasted this gold account :/ I click to set to lowest price, submit prices, it claims all prices have been submitted, but I just checked my shop and no prices have changed.

Are you getting the Autopricing complete! message at the end? If you go back to the Autopricer page, does it let you try again?

It does let me try again but no I don't get the "complete" message.

...except just now when I tried again to double-check. I probably had a problem with my Java blocker - my mistake. Sorry guys!

Sounds like you just weren't getting through all 3 steps but I'm glad you got it figured out c: