On average, listings lease in the $10's per square foot per year. The Mississippi region is going through a decline in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 15% decrease in rent.
In the last 90 days, 136 listings have been posted online, so you'll want to check back regularly for new listings. About 1% of the available space in the Mississippi are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,770 sqft. Most buildings in this area are approximately 1 stories. Most buildings in this area were built in 0 and are Class B.