Accurate PC, of Indianapolis, comes highly recommended by me. Accurate PC is a computer repair and sales shop, located on Legrande Ave, right across from the post office (closest major intersection: Raymond & State).
I went to Accurate PC yesterday looking for a DSL modem. The owner of the shop said he had a used one, but he didn't know whether or not it worked. He let me take the modem home, on my word that I'd come back and give him $25 for it if it worked. It works, since I'm online now typing this!
Big kudos to Steve at Accurate PC!