My family of 4 adults has signed up for a Rome and Florence shore excursion with "Share a Shore Excusion Italy" . They have great reviews on Tripadvisor and are a very good deal for a private tour. We are hoping to get 4 more people for each tour.
This is their website: Share A Shore Excursion In Italy :: Home
We have signed up for the Best of Rome with Skip the Lines tickets to visit Rome and the Vatican ( tickets are included for the Colosseum and the Sistine Chapel). The price for each person if there are 8 of us on the tour is 130 Euros (or 145 if there are 6 of us)
We have signed up for the Florence and Pisa tour as well. The price if there are 8 of us is 85 Euros.
Check out their website as there is all the information about the tours. Our groups is called Carnival Sunshine May 5th Sailing and we are the Lacey Family. You can find our group under the "Excursion Finder"