This property is currently pending, there are numerous homes on the market for sale in Tracy that don't have signs in the yard. This is for various reasons. REO agents who have listings in Tracy, but don't work buyers sometimes do not put up signs, home owners who are doing a short sale may not want the neighbors to know, and request that there not be sign in the yard. If you are looking to buy your best most efficient use of your time is to a) find a good Realtor that will WORK FOR and WITH you to find you THE home for you and b) use a good "real time" BIN system. A BIN System, Buyer's Information Network, will deliver real time updates to your computer notifying you of homes that fit YOUR criteria. Feel free to use my BIN if you are not currently working with another REALTOR.
Good luck and congratulations - it is an incredible time to be buying a home.