I have a rather small stash, by KH standards. Fifty or fewer skeins, I'd say. I have four sitting on my bed. :rofling: I've obtained at least half of it via some sort of free exchange, whether it be Freecycle or a donation from someone I know who doesn't use yarn anymore. The rest of it I bought, some of it even on sale!
I like having a stash so I can find projects to do whenever I run out of something to have on the needles.
Oh, and Aidan, that Red Heart you don't want to get rid of sounds perfect for an add-a-square afgan project. I'm still looking for a large acrylic stash to grab from somewhere so that I can make an afgan (I don't want to use any of my nicer stuff).