VISITORS TO MACHUPICCHU CAN WE BUY OURSELVES ENTRANCES FEE TICKETS?

A reservation is a step prior to the purchase of tickets (tickets for admission to an archaeological site that manages the Regional Directorate of Culture – Cusco), where the visitor (domestic or foreign tourists) indicates the possible date of admission to the archaeological . This step is very important because it generates a reservation code with which to make payment and print the tickets.

this is the web side you need to visit for buy a ticket to Machu Picchu
.http://www.machupicchu.gob.pe

More info click here.