Commercial Office Rental Comps: where can they be found?

[Brian Knox]

Do you have a good resource for where I can find what 100-200 sq ft of office space rents for in a certain city (Simpsonville, SC in my case)? In other words, I'm looking for commercial rent comps.

For residential, I am comfortable calling property managers and using Rentometer.com, but for commercial rental space, I just don't know where to go. I have called on 4-5 listings so far, but I'm looking to supplement that.

Thanks! Brian