Hi Patrick,

Thank you for contacting Mearto with your appraisal inquiry.
Gacy is best known for his clown and sports-related artwork; only one landscape of his has been auctioned (https://www.liveauctioneers.com/item/61239705_john-wayne-gacy-american-1942-1994-landscape) and it brought $550 in 2018.
Based on the photos and information provided, and subject to examination, this is:

John Wayne Gacy (American, 1942-1994)
Mountain landscape (no date)
oil or acrylic on artist's board
24 by 30 inches
signed lower right
PROVENANCE: acquired at auction
$400-600*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, and thank you again for using Mearto.