I found a used copy of Xenogears (for the PlayStation) in an Electronics Boutique (before it became EB Games) in the Arsenal Mall in Watertown, MA. It was about $26.00 or so, but it was extremely ecstatic. I played the game before and it was amazing and I was never able to find it anywhere else. Since it's been basically discontinued, there are a few limited amount of copies out there and I am pretty lucky to have one for myself. And the discs are in great condition, too.
I found Legend of Legaia (again, for the same PlayStation) in the same said store, but at the Cambridge Galleria in Cambridge, MA. Another great find.
And last but not least, I found my beloved Eternal Sonata (for the Xbox 360) in the GameStop in the South Portland Mall. I believe Jenn/CJ Gren can tell you the glee and excited stupidity on my face and how I was reduced to a five year old little girl in a matter of seconds when I saw the game. 'Nough said.