How to print the prices node.tpl.php?
Calling render($content[...]); renders the field—but you need to change how the field is being rendered. To do this, you'll need to modify it's display widget.

Go to Admin→Store→Configuration→Product types→Product type→Manage Display. Then, on the price field, change the the formatter (the first arrow):



This can be further configured by clicking on the gear icon (right arrow) to get access to more configuration.

If this still does not suffice, try these:


Add a HOOK_commerce_price_savings_formatter_formatter to your theme to override the theme provided by the module.
Create a new formatter (the price saving formatter modules can be used as an example) and then use that formatter to display your prices.