collective.behavior.price provides price related behavior to dexterity content types.

• Plone-4.3.6 with Python-2.7.10 [taito]

The behavior can be added through the web or directly through the file system to the dexterity content type xml file like:

<property name="behaviors">
  ...
  <element value="collective.behavior.price.interfaces.IPrice" />
  ...
</property>

You may also set currency through content registry and price with currency will be also cataloged with metadata: money.