On average, listings lease in the $10's per square foot per year. The Champaign region is seeing a a boost in rates. In the last 3 months, the median rate went up $20 per sqft per year.
In the last 90 days, 40 listings have been posted online, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. About 50% of the office spaces in the Champaign are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 3,200 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this market are close to 2 floors. Most buildings in this area were built in 1988 and are Class A.