Helpful research tools and more
https://comicarttracker.com/en
https://www.facebook.com/ComicArtCommunityGallery/
https://www.facebook.com/groups/459273764470607/
https://www.idwpublishing.com/product-category/art-books/art-books-artist-edition/
https://www.usatoday.com/story/popcandy/2012/11/27/collecting-comic-art-glen-david-gold/1729703/
https://medium.com/@joshualeto/is-investing-in-comic-book-original-art-a-good-idea-e064274fa17b