Guys, I've sold my Blookat so I can tell you an accurate value. Its currently floating around for 130-150k, which I think is fair to be honest.
My FC wings, which was recently sold along with a blookat in the same trade (LOL, I buy blookats as often as possible...) is valued at 500-700k shells, safely. I personally give it a cold hard numeric value of 660k FLAT. (This trade got me a modern katana... added a bit more, yet don't feel like specifying).