Hilario is an Argentine art, books, and collectibles business that connects distinctive works with collectors through online auctions and direct sales. Its carefully curated offerings include original, rare, unusual, and historically significant pieces, selected for their appeal as collectible objects. Categories range from fine, popular, and ethnic art to photography, prints, textiles, silverwork, furniture, maps, historic and military objects, decorative arts, and contemporary and antique books. Customers can browse themed collections, including saddles and bookbinding, and explore featured works and seasonal selections.

Hilario organizes eight online auctions each year, preparing catalogues after detailed study of the works. It also sells selected items directly, with each sold piece accompanied by a study of the work. Sellers may contact the business to discuss offering works for sale. Beyond buying and selling, Hilario supports collecting through expert commentary, practical guides, reading recommendations, cultural itineraries, news, and a digital magazine featuring articles on art, history, photography, and collecting.