yup, I did that mistake! but it was my mistake for my reason!
I replace my collection with Disneyland travel, that my kids, even as grownup remember forever! Yup my Vinyl paid my expense for a Disneyland experience with wife and kids!
On the down side:
problem 1: most of the album I had back then, now worth, since I am old and they were original from Japan and USA and some were first generation of analogue record! So it mean, were not remastered. so no more original recording, gone by selling it.
out of subject: “[I am a fan of original engineer and artist choice, if they made it to sound that way and choose those song, it mean, they estimate it was there best and gave you a sort of history perspective. That`s the problem when you read G. Orwell 1984
, you don’t like when history is erase and replace]”
Problem 2: Since I listen them a lot, it`s hard to listen some modern redone on streaming and all compression that is done so tiny earphone to trick you that it is sound amazing.
Problem 3: all original mastering of the 60’ 70’ 80’ have burn in the King Kong 
fire at universal. That’s why they invent the remastering, it is to cover the copy of the copy: you cut the top, you cut the low and you boost there rest. Nobody, will ear it come from a k7 tape or an old vinyl. Except you, you hade the original, you will know what missing.
Problem 4: Bad Sound 
for modern version of old record and for modern recording to less and less engineer no how to record dynamics
Dynamic on a record is loudnessed!
Problem 5: Since It is an old album, often, it is not on streaming services 
and used copy are in bad shape and cost the price of a house.
Problem 6: streaming services goes with demand 
, so as old People that are there listening music and that will approach or pass after there “best before 
” date! It mean old People will stop listening music, and move to heaven HiFi store Record Store [
St-Peter, do you have some Nirvana record, no but we have Nirvana show tonight, wow even better ]. New generation will increase and modify the algorithm by there choice of listening! So in my time, it meant more “Madona” on the readio, now it’s more “Beyongt’sé” and “Swift knife” singer on Streamer. [those poor girl, someone should tell them how bad there music is recorded]. So more crap for old People that had not left for paradise or are on Highway to Hell! 
Problem 7: Person who buy as a lot, it is for resale 
, so the price offer will be, half the market value, minus all the degradation he could find. you will be lucky if you get 1/4 of the market value.
On the plus side selling it:
A- you could needle drop, your best album before selling them 
B- take time to check current value on Discogs 
, and get the best value you can.
C- Forget your old music and memory, go with new generation music, plenty of old-new sound artist in Jazz and Classical, like they said a mind is like a parachute it work better open! be part of the new Algorithm!
D- start new with a streamer + integrate amplifier + and speakers 
E- Memory is in your head, like nostalgia, not in things 
F- Normally, when you sell, it is before you are prepare to move, to another part of life!
G- If you don’t sell, to gave an heritage, well, not a good idea, widow will invade market with your old record, don`t bother giving them to our kid, they have a iPhone and pay per used and value will go down down down. Kid living in the now, an already took what they loved or needed without often telling you
H- CD in Europe are gaining popularity, frankly i don’t know why
So it`s a 50/50 decision!
Why a turntable? For my parts, since cartridge and turntable, could change sound by the match, i have return to Turntable.
For CD, I have ripped them and told streaming services where my music is, not to play them, but to have a algorithm that is influence by my 40000 songs and play the kind of music I like [don’t tell anyone, but work the best with Azon illimited ]
For my CD storage: I discard my Jewel case and buy CD Carrousel 
player [400 cd storage]. I use it like a jukebox for when i am to lazy to choose music: I “Just Push Play” the CD carrousel choose a CD, play it`s integrity and than randomly choose another one [that’s the function, that is missing in streamer services that made me come back to CD Carrousel and Vinyl
Good luck