Yeah, we could see their address in ShenZhen, China right here
http://www.wellcoressd.com/about-us/culture/company-profile/
http://www.wellcoressd.com/large-capacity-256gb-cf-compact-flash-card-with-high-speed-1100x/
Dormitory-style (potential sweatshop like Foxconn etc.) as usual and that's why I'm still thinking about whether I should vote with my dollars or otherwise.
So far they're only selling via Alibaba / AliExpress instead of paying those pesky eBay fees
http://wellcorping.en.alibaba.com
http://www.aliexpress.com/store/112397
You can pay a premium for a brand name card such as Lexar or Sandisk. But if $492 is too much to swallow, then you may have to wait for another 5 yrs or more to get a brand name 256GB CF.
I am just thankful Wellcore make these cards which are reasonably affordable to me, even tho I could spend $1000 or $10,000 for a 256GB CF if my life depends on it.
I wanted a 240GB ipod two yrs ago after using rockbox. Almost bought a 240GB HDD before I came to realize how CF improves battery performance and other things. Then I need the spared internal space for bypass mod caps. Now I finally have a beauty, the DMod, which has everything I need including rockbox. It rocks.
BTW, the card hasn't caused a single hiccup so far. Power efficiency is just as good as my other CF's if not any better.