The typical asking rate per listing is in the $10's per square foot per year. The Mississippi submarket is going through a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 6% decrease in rent.
In the last 90 days, 136 listings have been made available, so you'll want to check back regularly for new listings. About 1% of the office spaces in the Mississippi are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 2,250 sqft. Most properties in this region are around 1 floors. Most buildings in this area were built in 0 and are Class B.