Don't panic. We're actively working on the $25 dollar phone that was reported earlier in the year (e.g. http://www.cnet.com/news/with-firefox-os-mozilla-begins-the-...). So there will be quite the range of price points to be had.
However, one of the biggest problems the community ran into for the ZTE Open was that hardly any Mozilla devs had one. So even though it was the most easily obtainable phone for the dev community, it received very little Mozilla support.
As these low-end devices push the limits the most for Firefox OS, will the Mozilla team start to work with them more?
Would be useful if potential customers could quickly see in a table which carriers are supported and upto what data speeds.