That question is way too broad; there are entirely too many variables for anyone to give you a blanket area, such as:
-location and I mean EXACT location
-condition of the home
-market factors in the EXACT area of the home
-pricing; is the home priced consistent with the existing market and present buyer expectations
-time of year; historically some times are slower than others
You would best benefit from consulting with an experienced, knowledgeable real estate broker in your EXACT location. I know I sound like a broken record with the word 'exact', but it is critical; the same house the next block over may generate a major difference in value.