I keep down to around 1500 vinyl, which is manageable in terms of keeping clean and reasonable usage. Two regrets; I gathered all my doubled up albums from buying job lots, sorted the best condition to one pile, got them mixed up and sold the best ones by mistake. Secondly, in a job lot 10 years ago, I got two sequential albums on Spanish tuition, "what do I need these for?' and sold them on - they were the Andy Warhol artwork albums, and worth $10,000 I find out recently.One other thing is that although I treat my CD's as I do my LP's, they crap out and become unplayable for no apparent reason, possibly my CD player is too fussy as they will play in the car - some of my vinyl albums I bought 45 years ago and still play as new.