I've tried to use the web site firenzemusei.it to reserve tickets on line. It doesn't seem to give me the option to do so. Any help as to how to do it? Any help as to the cheapest other site to use?
Just ask your hotel to make the reservation. They speak the language and know how to do it.
Try this - it is the official site http://www.b-ticket.com/b-ticket/uffizi/