Is this set rare because it was a grand opening exclusive?

Yes, this set is a LEGO Store Grand Opening Exclusive from South Coast Plaza in 2011, making it a unique collectible.

How many pieces does the COSTAMESA-1 set contain?

The LEGO Brand Store Exclusive Set, COSTAMESA-1, contains exactly 12 pieces.

This item is part of the LEGO Brand Store theme.

Name: LEGO LEGO Store Grand Opening Exclusive Set, South Coast Plaza, Costa Mesa, CA (COSTAMESA-1)
Brand: LEGO

LEGO Brand Store

LEGO Brand Store · 2011

Theme · LEGO Brand StorePieces · 12Set Number · COSTAMESA-1Year · 2011

Used

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New / Sealed

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Is this set rare because it was a grand opening exclusive?: Yes, this set is a LEGO Store Grand Opening Exclusive from South Coast Plaza in 2011, making it a unique collectible.
How many pieces does the COSTAMESA-1 set contain?: The LEGO Brand Store Exclusive Set, COSTAMESA-1, contains exactly 12 pieces.
What theme does this specific LEGO set belong to?: This item is part of the LEGO Brand Store theme.