Albums: $10K+ over the years I guess. Water under the bridge. Music kept my sanity working overseas.
Bought 400+ CDs and 130 each - 24K golds, and 20 MFSL Aluminums at full price so that was a chunk of change.
I've found 75% of my LPs (been really lucky) and 50% of my CD collection at the GW, thrifts, garage sales, & just around - all dirt cheap really. ALL 'great titles' and all M- 'actual vinyl' and M- total CDs & cases. Like new.
Bought 500 cassettes back in the day, whatever that cost. Still have 250 of the 'special ones'. I could sell 30 fairly easily for $20 TO $25+ (very 'Rare' ones - Hendrix, Punk, etc. - Discogs). The 2 wooden NAPA wall-mount cassette racks sell 'for some coin' too but I'll probably keep both. My wife uses one & I use the other.
Also, have 2 'Sorice' solid Teak CD cabs & shelves - smoked glass doors. Nice! Still perfect, like new. But 'each one' only holds 300 CDs (total 600 CDs). Still - I love em, bought them new.
And then there's the music 'accessories', books, art, etc., the stereo itself, & 3ea 1960s Fender & Gibson guitars & 3ea 1960's Fender, Marshall, and Peavy bass amps, and associated guitar equipment- but that's all a whole other ballgame.