I haven't been pulled over yet since I moved to Atlanta, but I see 'them' clocking speed often on the way to work. I'm not a crazy ass 100mph driver, but sometimes you flow with traffic and can easily go over the speed limit by 15+mph. Traffic on the 400 can easily flow 25+mph over the limit of 55 (or 65, depending on area).
What's a good one that runs under $300 or so? I checked on E-bay and the price ranges are pretty extreme, so I don't know what I'm getting myself into.