Is the LEGO 5108-1 piston still in high demand?

Yes, as a specific piece from the 1989 Technic theme, it is desirable for completing vintage sets.

How rare is this 1-piece Technic item?

Being a single part from a 1989 set, it is considered a specific and potentially rare component for Technic enthusiasts.

Condition will vary, but buyers should expect a vintage piece consistent with its 1989 release year.

Name: LEGO Pneumatic Piston 2 Cylinder (5108-1)
Brand: LEGO

Technic

Technic · 1989

Theme · TechnicPieces · 1Set Number · 5108-1Year · 1989

Used

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New / Sealed

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Is the LEGO 5108-1 piston still in high demand?: Yes, as a specific piece from the 1989 Technic theme, it is desirable for completing vintage sets.
How rare is this 1-piece Technic item?: Being a single part from a 1989 set, it is considered a specific and potentially rare component for Technic enthusiasts.
What condition should I expect for this 1989 part?: Condition will vary, but buyers should expect a vintage piece consistent with its 1989 release year.