The typical asking rate per listing is in the $20's per square foot per year. The Broken Arrow submarket is going through a an increase in rates. In the last 3 months, the median rate went up $22 per sqft per year.
In the last 90 days, 8 listings have been posted online, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 75% of the available space in the Broken Arrow are subleases, so you might be able to find a shorter term or below market rent. 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 1,950 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this area were built in 2000 and are Class B.