Some nice articles I came across via MRU:
This one on Tinder's under/over 30 pricing policy and this one on student Spotify plans, both with (gasp) actual data.
This one is a little old but has a ton of examples (and also uses and explains accurate terminology)
This one and this one make great starting point for a discussion on whether tech makes price discrimination easier or harder for firms
Also this podcast on price tags is pretty good - they're so ubiquitous that it's easy to forget there was a time before them, and that we're possibly moving to a time beyond them. This one on the 'Pink Tax' is also good