I decided to sell mine because I didn't have enough ilvl70 people I trusted to pop it with >_>; got 290K or so.
You should be able to solo them pretty easily on most jobs. Did one on my i96 WAR practically in my sleep.

I got mine from my daily map harvest (boar -> unhidden). I was pretty excited about getting and just popped it. They were selling for around 250K on Tonberry at the time, I ended up with around 350K worth of stuff out of it.