Jess/Carmen, there is a load of stuff that ends up on Trulia from various sources, some is for sale, some isn't (still a mystery to me). If you are looking for a search source that you can be sure has current active listings use, and assuming you would like to continue searching for a property on your own, do so via http://www.Realtor.com
as they load ALL listings from ALL Assoc. of Realtors MLS systems automatically.
Trulia is making strides to do this as well, but it will be some time before their feeds are comprehensive and accurate and fully informative (case in point).
Happy Hunting! -Steve