They may have built up a collection so soon after the format's debut by importing foreign releases. DVDs were also very expensive at the time, although Mr and Mrs Granger, as dentists, could presumably have afforded to be early adopters.
The depiction of the Granger family owning three shelves of DVDs in Harry Potter and the Deathly Hallows: Part 1 is somewhat anachronistic, as the scene in which they appear is set in the summer of 1997, when the DVD format had been commercially available for less than a year.The Granger family had amassed a moderate collection of DVDs by mid-1997. The edition of the Muggle entertainment magazine Radio Times for London, Anglia, and the Midlands ran an exclusive DVD giveaway offer in a 1997.
