Paris Catacombs tours

The visit to the catacombs seems to be in high demand, to the point that you cannot book more than 7 days in advance because fake entry tickets are issued.
(there is a warning message on the Catacombs website)

https://www.catacombs.paris.fr/en

So if you find a guided tour make sure it is reliable.

I liked the audio guide just fine. We got held up behind a tour for a few minutes and I did not overhear anything that made me wish I had paid more for a guide.

If you can read, this is the last site on earth that would require a guide. Just read up a bit on its history before you get there. https://janettravels.wordpress.com/2013/01/12/catacombs-a-creepy-paris-stroll/
We did this nearly 10 years ago before some movie made it a must see; so for us line was short and it wasn't crowded underground either.

Note that the place you exit is quite a long ways from where you enter; particularly important if you are meeting someone after the stroll underground.