never heard of 卖打折的 PASS

1. There are several ways to buy it.

- find a least popular museum that you can use the pass and buy it there, so you don't have to wait in long line to buy the pass the first time.

- buy at a tourist information desk at airport or train station.

- Some tobacco shops sell it, but they accept cash only. (this is how I bought it, at a tobacco shop close to one of Louvre's entrances)

2. When you see a long line at the museum, most likely it is the line to buy ticket, just go straight to the front, showing your PASS.They will either let you in there or signal you to use the group entrance or something.

Only one time Paris Museum Pass didn't let us skip the line, which was climbing the stairs of Notre Dame's north tower.

3. We used it at the Louvre, Orsay, Rodin, Army Museum, Centre Pompidou (modern arts), Arc de Triomphe, Notre Dame, Sainte Chapelle, and Versailles. Loved them all.