Since she only had it for 1000 miles, there isn't much of a maintenance history. She had a mechanic friend go through the whole bike when she first bought it, swapped the front tire, and had two oil changes done. The way she described things, the mechanic had both the tank and valve cover off, leading me to think he did check the valves.
The battery went bad after it sat for a year - but after replacing it, the bike didn't skip a beat during about 100 miles of commute. Before the battery went bad, she didn't have any problems with it either.
Let me know if you'd like to check it out, and we can set something up! Her asking price is lower than any non-ratbike on CL, I think whoever grabs it will be getting a good bike for the money.