in australia it seems to be the cheapest 10A EVSE $AUD350
unfortunately it doesn't come with the yazaki j1772 charge coupler so I wouldn't use it in public since it can't be locked.
watch out for quality control though. the original unit that came with the Holden Volt showed up with red LED charge fault. Replaced by Melville Holden under warranty.
nissan leaf has option to have a cover that covers the charge ports in public $AUD515
I just received the Clipper Creek (CC) ECS-20 15A EVSE. Got it for the Holden volt, but it trips its 20mA RCD/GFCI. Will Barrett (CC) is working on fix.
BTW CC makes the 10A volt EVSE.
costs $AUD700 for both 10/15A CC EVSE.