Most listings are in the $20's per square foot per year. The Merriam submarket is going through a decline in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 15% decrease in rent.
In the last 90 days, 11 listings have been posted online, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 6,200 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are approximately 3 stories. Most buildings in this area were built in 1980 and are Class B.