Thank you for your reply.
I am not a developer, in the past I have used Dreamweaver and Frontpage 2003 to develop webs. I am trying to setup a classifieds site. Thanks for the url regarding the credits system.
Since writing my post above, I have discovered that Woocommerce works with Monero, so if this software is compatible with Woocommerce then It should be possible to take Monero crypto-currency as a payment method.
The only problem remaining is the double blind email system. I understand what you said above. But a single blind system won't do for what i want. I want a system like Craigslist has so that customers have their privacy. Is this something that cannot be done on Wordpress at all? Surely there is a plug-in that could handle that? I don't mind the extra server costs.