Thank you for your comments, we are very glad you enjoyed your tour and hope we can address your concerns about the cost here.
This tour is a semi private tour for 6 guests maximum. We buy special tickets at the catacombs that allow us access to restricted areas that are closed to the general public, these areas will be unlocked for you and your small group. We have to buy them several months in advance and they are very difficult to get. We also buy a reservation which allows us to skip any lines and go straight in.
Our guides are all professionals, we pay them correctly for the wonderful work that they do leading these tours of the catacombs. I'm sure that our guests will agree that having a good guide makes for a very special moment in this very special place.
If you are interested in any subjects in particular please don't hesitate to ask your guide during the tour, they are always happy to answer any questions!
If you would like to learn about what went on underground during WWII, there is another wonderful museum right by the catacombs which covers this, the Musee de la Liberation Leclerc Moulin. Here you can see the underground defense shelter used as command headquarters by Colonel Rol Tanguy.
We hope that you had a fantastic stay here in Paris!