As an official local guide in Florence I recommend you to be very very careful when you decide to reserve tickets for the Uffizi Gallery or for the Academy Gallery .  Recently they create the website of the Firenze Musei  to reserve tickets even on internet,  but you can also call  at   (0039) 055 294883   the  FIRENZE MUSEI,   the office in charge of reserving  tickets.

Please be careful:   any other web site suggesting reservations is not the official one and they may charge more than the double cost of the ticket   which is  10,00 euros plus 4,00 euros for the reservation  TOTAL  14,00 euros.