Most listings are in the $20's per square foot per year. The Salem submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $2 per sqft per year. That's a 6% decrease in rent.
In the last 90 days, 25 listings have been listed, which means spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,190 sqft. Most buildings in this region are approximately 2 stories. Most buildings in this area were built in 1984 and are Class A.