Firefox OS phones are now on sale in Australia! You can buy a ZTE Open C with Firefox OS 1.3 installed for $99 (AUD) at JB Hi-Fi. (For non-Australian readers: JB Hi-Fi is probably the biggest electronics and home entertainment retailer in Australia.)
Australia’s not the ideal market for the current versions of Firefox OS, being a country where a large fraction of people already use high-end phones. But it’s nice that they’re easily available 🙂