Most valuable LP

MFSL Nirvana, Nevermind.  

A tape of the "original" Beatles Esher Demos on which the George Gobel tracks were not edited out.

Priceless.

DeKay

Pink Floyd-Wish you were here 1/2 speed master disc.

LPs can’t hold a candle 🕯 to cassettes in terms of value 💰 

http://www.valueyourmusic.com/most-valuable/cassette/last-week

I don't know the value of anything in my collection.  I suppose the Mobile Fidelity complete box sets of Beatles and Rolling Stones are worth something (given to me as a gift from a friend who also gave away to someone else a Butcher cover Beatles album).  For a while, my Neil Young "On the Beach" was worth something because it was not reissued in CD for the longest time.  

I have a number of supposedly valuable Jazz recordings, though no original Blue Notes, but, I've not actually tried to price them.

Some of my personal favorite finds were $1 records at a used record shop.  I particularly like the "Missa Criolla" by Los Frontieros on Argentinian Philips.  This is a very early recording of this mass, done by a folk group, and I like it more than the recordings later made by "serious" opera stars.