TheFirstAvenger said:
So just checked the list... what wasn't noted was that X-Force Omnibus is at #152 with only an estimated quantity of 671.

Wow! I thought it would have been higher.

Could the fact that two Omnibus were released in the same month have split the numbers between it and Iron Man by Layton?
JOE replies:

Could also have something to do with the fact that 95% of the material in the X-Force Omnibus is readily available in two readily-available Marvel Premiere Classic hardcovers (A Force To Be Reckoned With and Under The Gun). Which in addition to being lower-priced, have the advantage of smaller Liefeld art.