I can't remember the artist but there's a fun song about how they used to pick up second hand LPs really cheap and then they got popular and too expensive, then discovered second hand CDs are really cheap now.
Frank turner-ish vibes but I don't think it was actually him.
It's completely un-googlable though, and even the LLMs aren't much help on this one.
Oh! I know this one! You're thinking of Jeffrey Lewis & The Voltage's LPs from 2019: https://www.youtube.com/watch?v=3urXygZXb74'