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.