Compared to the rest of the St. Louis market, the St. Louis region has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 80 listings have been posted online, so you'll want to check back regularly for new listings. About 1% of the office spaces in the St. Louis are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,160 sqft. Most buildings in this area are around 3 stories. Most buildings in this market were built in 1964 and are Class B.