Is there any extension that allows to hide product prices and disable checkout for not logged in users?
Instructions on how to modify yourself:
http://www.magentocommerce.com/boards/viewthread/22673/
Look for the instructions posted by szotyi about halfway down the post. He does a nice job of walking you through the process.
Or, one you can buy:
Finally, one that is even more expensive:
Our B2B module also supports this feature and some more: https://github.com/sitewards/B2BProfessional
I think you are looking for this http://www.magikcommerce.com/magento-hide-price-extension Magento extension which hides the product prices, enables call for price functionality and even let you configure various other options.
来源：https://stackoverflow.com/questions/6299366/hide-prices-and-disable-checkout-for-guests