So just how much vinyl do YOU own?

David12.

Your last statement does worry myself as well unless my daughter deals with it.
Left to my wife she would likely just put them all out on the curb!
But as to the valued ones yes indeed.
Part Two of reasoning of catalog all on Discogs so value ( or at least an idea based on past sales) is easily known to all.

Around 1200 the last time I checked years ago.  Still not alphabetized, so when I look for a certain lp I come across many others I forgot about that will get played.  It's my way of checking them all out instead of just going to a certain section where they should be.

Mine are mostly in alphabetic order unless I get lazy with new arrivals and they just all end up in one big pile... lol.
Now my tapes, well they are another story, I suppose I should put them in order but I find it is similar to your statement, when I pull open a drawer to look for something I find other items to pleasantly distract me.
Sometimes means I never get to play what I first started to look for though! 

I'm sure I've said this on other forums here but I have thousands...even after more than a few wholesale blood-lettings.  I've got the Monaural and early Stereo records my dad bought in the forties, fifties and sixties.  I started collecting for myself when the Beatles hit.  For a while, I worked at Tower Classical Records in Hollywood alongside my then future wife. Employee discounts.  Record Label Promotional Copies (which were always the first copies pressed). 

Ed.
That sounds like you have a very nice collection there.
Enjoy them!