Over here the price of a base model is the same as a Zero FX, for a significantly more powerful (60hp versus 44hp), more off-road capable, lighter (110kg versus 130kg), and higher quality bike with roughly the same capacity (6kW/h versus 7.2kW/h, will be even closer now). The downsides are it's not road legal and I assume it doesn't have a built in charger, they do say the charge time is 2 hours or a 1 hour fast charge so not sure what's included with the bike but either way it's also faster than an FX.
It's not cheap by any means but I think it's a decent price for what it is (you can upgrade to 80hp for an extra £1k too). There are people who spend just as much if not more on pleasure ICE bikes, by that I mean stuff that isn't used for commuting. If I was lucky enough to be earning enough to be one of those people I'd love to spend like £12k on setting one up as a super moto and getting it road legal (wouldn't be too difficult in the UK as no lights or even mirrors needed).