Where can i find old lego playsets?

When I was about 7 or 8 (about 15 years ago) I had legos sets such as a horse ranch and a hotel, geared more towards girls, rather than the castles or pitates or cars and spaceships that boys would rather have. I looked on lego.com, they had only new legos. No one believes me when i tell them abot my childhood toys! I would love to find them for my own little girl.