Think Tank Ashcan
Top Cow/Image Comics, Early 2012.
Rare Think Tank is a comic based around researcher Dr. David Loren, a child prodigy and "slacker genius", recruited to design weapons.
This is the rare Ashcan variant given out at the Image Expo in February 2012, limited to only 150 numbered copies, some of which are signed.
Shown below are: the 1st print, the Bagus Hutomo "virgin variant" (1:10) and the second print:
Below is a copy of the ashcan graded 9.9 by the, sometimes controversial, Professional Grading eXperts LLC (PGX):
CGC have not graded any of these to date and that may be due to the ease with which a counterfeit could be created (similar to Cry for Dawn #3 Horror Con Variant).
These ashcans are extremely difficult to get hold of and notably one collector is known to own a large proportion of them. Also, given the lack of visible realized sales, they are very hard to price.
Right now on eBay