I keep reading about the Acropolis Pass that gives admission to the Acropolis, Acropolis Museum, Archeology Museum, and other sites but I can't find how to buy it on-line. The official page talks about it but doesn't seem to offer a way to buy it. Does anyone know how to buy this in advance?
Thanks
After you select a location, date, and time, just select the "combined" 30 Euro pass!
The €30 combined ticket available on the official website mentioned by AbbyO does not include Acropolis Museum and National Archaeological Museum.
These tickets must be purchased separately.
For the National Archaeological Museum you can buy the ticket separately on the same website.
Regarding the Acropolis Museum tickets are available here:
https://etickets.theacropolismuseum.gr/?culture=en
Many websites will offer you combined tickets or "citypasses" with supposedly skip-the-line and other advantages.
Note that you will not have any additional advantages compared to the official sites
The" skip the line" is simply the fact of buying your ticket in advance instead of buying at the ticket sales office on site the day of your visit.
If you go through the official sites you will pay €52 per person for all the sites you mention (summer 2022 prices) with tickets valid for 5 days.
With some "citypasses" it can cost more than 75€ for the same visits.