Sorry, I did use Security Assist for the login/registration pages.
I have now successfully added a Show Region around the price on my results and detail pages. I've also added a login rule to the cart page to prevent prices being shown unless logged in.
If access to the cart page is denied is it possible to offer a visitor the option of A. logging in if they have previously registered or B. Registering if they are a new visitor to the site?
The Access Pages Manager only seems to offer one redirect.
Any unforseen problems with this approach?