Chicago area sites

I recently acquired a GRiD laptop (486 mono version) and it had the hard drive in it and on it were some (non-DOD) files that shouldn't have been left on the machine at all. They were classified but the IRS should empty their machines before a field agent turns them in. I called the office I bought it from, they checked records and had a person from the office that had it contact me. I told them what was on it and that I would, without fail, fully delete all info on the drive and that I wanted them to be aware that things are leaving their office into the general public. I was thanked by phone and a week later by mail with a check for $75 for my time and effort in cleaning it up and preventing a possible disaster. Wanna bet that's the first thing they look for when I get audited?