Just grabbed mine at a Barnes and Noble, thanks to a member discount email I got it quite cheap. Around $25.
There are some errors, I hope this doesn't turn out to be piled thick with them like some of the MM books, as reviewed by John Cooper. Just at a flipping through, I noticed...
Shields were left off the Adamantine price table, again.
As noted above, weapon hardness and hit points.
Eyes of the eagle, in the table on MIC page 247, are said to bestow a +5 to Search.
The summary of cold iron is off. Ordinarily cold iron is x2 weapon cost plus masterwork price, per DMG, while magic enhancement add +2000. Except the summary table in MIC says magic enhancements multiply cost by 2, on top of a base +2000 gp cost. Unless the MIC changed it... or did I miss errata somewhere and I have it wrong and the MIC has it right?