If the town does not show the history on the property under the assessors record, you can try by searching the deed at www.salemdeeds.com
Also Zillow may have some history as well.
Michele Allison Elwell CBR
Have you checked other listings (both sold and active) around yours? How different are between the original listing price / final listing price / sold price and the DOM on each listing? Did you check the traffic on your MLS record?