I couldn't find a thread on this, so here it goes.
I went to trade in some crappy DVDs I had laying around for some credit, and after talking to the guy at the counter (who, amazingly, was incredibly polite and actually smiled and helped me out without complaining!), I noticed a small display which said that they would no longer be accepting N64 and PS1 games in for trade.
I then noticed a huge rack of PS1 and N64 games near the counter on one of their tables, and they all had really cheap prices. I saw Soul Blade (Edge) GH for $6! So I think that they started liquidating their stock...
Man, this is a sad day. I know both systems are age-old, but I never expected to see them (possibly) stop selling PS1 games, used or not.
And right now, I wish I owned a PS2 so I could buy some of those games. :P