As suspected, I received notice a few hours ago from JCW. They are 'sold out' and not honoring the clearance sale. Oh well. If it's too good to be true, it is!

>> Date:    Tue, 3 Jan 2012 22:55:06 -0500
>> From:    Jason <uberhare@GMAIL.COM>
>> Subject: Re: $4 inverter deal from JC Whitney with free shipping
>> 
>> $4 for an inverter?  Refer to the Skylight thread.
>> 
>> Jason
>> 
>> On Tue, Jan 3, 2012 at 7:17 PM, Courtney Hook <courtneyhook@shaw.ca> .wrote:
>>> Just tried to order it, and they said there was a pricing error and it was
>>> NLA. :-( Those that got them, well done!
>>> Courtney