Is the 5006-1 part rare for a 1987 set?

Yes, as a specific 2-piece Service Pack component from 1987, it is considered a rare find for collectors.

What is this part used for?

This is a LEGO Replacement 2-Piece Battery Motor Housing, essential for certain older sets.

The set 5006-1 contains exactly 2 pieces.

Name: LEGO Replacement 2-Piece Battery Motor Housing (5006-1)
Brand: LEGO

Service Packs

Service Packs · 1987

Theme · Service PacksPieces · 2Set Number · 5006-1Year · 1987

Used

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New / Sealed

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Is the 5006-1 part rare for a 1987 set?: Yes, as a specific 2-piece Service Pack component from 1987, it is considered a rare find for collectors.
What is this part used for?: This is a LEGO Replacement 2-Piece Battery Motor Housing, essential for certain older sets.
How many pieces are in the 5006-1 set?: The set 5006-1 contains exactly 2 pieces.