So just how much vinyl do YOU own?

+/- 7,000.  Been collecting since 1962.  The collection is mostly jazz and classical with some rock and other stuff.  I've curtailed my buying quite a bit the last few years and have started giving some of my dupes away.  Soon I'll start selling the more valuable items, here and/or eBay. As someone once (or twice or thrice) said, you can't take it with you.

Like rshak my estimate is about 7000.  Jazz, Classical, older Country, Pop/Rock, Opera and a nice Blues collection.  Probably not time left to hear it all.   I told my Wife’s friend it was for my retirement and she responded “Well good luck with that!”  

Looks like my collection is paltry at about 600 albums.
Although it is growing every week but it is very manageable right now

My collection almost doubled in one day!  A high school friend donated a very large number of lps to a local college.  They were placed in the library in old school fashion, pockets and checkout cards glued to the jackets.  Judging by the cards they were seldom borrowed. Years later, the school no longer wanted to maintain them and since he was the largest donor he had first dibs.  He knew I was collecting, called me and I scored big time. Thousands of records.  $0
Lucky me.

About 800. I'm trying to keep the size of my collection reasonable (for me). I've been taking records to my LRS and trading/upgrading. I come home with fewer records than I took with me.