No this payment gateway is not built into the ClassiPress theme. We have created a plugin for Stripe
as seen in the AppThemes marketplace along with other payment gateway plugins, however at this time these are compatible only with the Vantage theme. Our plans are to update the payments functionality of our existing themes (pre-Vantage), so that these plugins will in future be compatible with all of our themes. Unfortunately at this time we do not have a time frame for when this will be completed but you can also read more in
this blog post. Thanks.
