Is the LEGO King Boo set (71377-1) still popular for collectors?

Yes, as a 2020 Super Mario theme set, it remains desirable for collectors of the franchise.

How many pieces are in the Haunted Yard Expansion Set?

The LEGO King Boo and the Haunted Yard Expansion Set (71377-1) contains 431 pieces.

This specific set, 71377-1, was released in 2020.

Name: LEGO King Boo and the Haunted Yard Expansion Set (71377-1)
Brand: LEGO

Super Mario

Super Mario · 2020

Theme · Super MarioPieces · 431Set Number · 71377-1Year · 2020

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Is the LEGO King Boo set (71377-1) still popular for collectors?: Yes, as a 2020 Super Mario theme set, it remains desirable for collectors of the franchise.
How many pieces are in the Haunted Yard Expansion Set?: The LEGO King Boo and the Haunted Yard Expansion Set (71377-1) contains 431 pieces.
What year was the LEGO King Boo set released?: This specific set, 71377-1, was released in 2020.