Found out about company who will be offering Mozilla Dev phones for around $100 euro or so I hear? Either way rumors are they are not expected to exceed the $200 mark. For now I have signed up for the list and they will email you once the first batch is ready for sale. Not the best news I know as this does not allow us to play around any sooner, however if you are keen to play around you can flash an android device with the current Mozilla OS image. But note not all areas of the OS are working as it is still in preview mode aka not full release yet. And of course there is always the firefox Mozilla OS Simulator plug-in.
http://www.geeksphone.com/
https://addons.mozilla.org/en-us/firefox/addon/firefox-os-simulator/