Two questions about Mary Grandpre

Does anyone know if there is a collection of her Harry Potter artwork in book form that can be purchased?
Also, does anyone know of a place where I can buy reasonably priced prints of her Harry Potter art? The only prints I can seem to find are upwards of $500.

I love the extra art she has created surrounding scenes from the books and I'd love to have a collection of it or print for my wall!