Only 3K or so, so I keep 'em in random order (with the exception of a few set runs such as Venus Jazz and Music Matters, which I keep together just for the heck of it). Otherwise I just ignore everything more than a year old unless I really want to find something, which I might be successful at before I die.
How do you arrange the order of your records?
I guess some alphabetically. Some by genre. By quality. Etc.
My preference is keeping them randomly arranged. This way I get a nice variety and I don’t have to choose. And it’s always a nice surprise.
I take them out about ten at a time and place them in a dedicated space between my mono blocks.