The bigger point is this - even if LP prices are keeping up with inflation, here I am, retired, having made a "decent" income in my working years (and having spent a LOT of my disposable income or recorded music), I have almost always found better real-life uses for $30.00 than to buy just one LP (or CD, for that matter).
So - if the price has kept up with inflation, my appetite has not.
And yet, I still have that $30.00, and I will spend it on music. Just not on one LP. There is little to no value there for me. Probably closer to none, actually.
I get it - I am not the market here. But I was the first time around, and I bought buttloads of it then. But this is like selling dead music to dead people. Dead people with money.
Objection denied!