The glasses are on auction on EwbankAuctions.com, but you might want to check your vault in Gringotts before you decide to put a bid down, because the movie prop is going for about £3000 to £5000 (around $3800 to $6300).
The description for the glasses is as follows:
Harry Potter and the Philosopher’s Stone (2001) – Daniel Radcliffe as Harry Potter, a pair of silver metal wire frame glasses. Round clear lenses, bordered in black matte finish, silver metal earpieces tipped with transparent plastic. Left frame arm inscribed ‘FRAME MADE IN ENGLAND’ and right earpiece numbered ’40 20 135′. These glasses are one of only a small number of pairs produced for the film. This is one of the first pairs of glasses Daniel Radcliffe wore as Harry Potter.
The glasses can be found here.