Fernando Corbalán y José María Gairín, Las matemáticas que no aprendimos (2 vols.), 1987.

What is a pricing guide?

• The Pricing Guide is a guide of sold lots. An exclusive and free service for the community of users of todocoleccion.
• The Pricing Guide helps you to know the market value of the objects of art, antiques, books and collectibles by showing all the sales transactions carried out since 2000 in todocoleccion and it is updated with new prices (data) of items sold in real time.
• You can know the question of how much it costs or how much an object is worth from a few euros to many thousands: it contains millions of references of auctions and sales made successfully in todocoleccion.
• It is essential for collectors, appraisal and valuation of art objects, antiques, books and collectibles.