I've always been leery about buying used electronics, but you make some good points. At this time, though, Performance Bike had a 1609 on sale for less than $60. So I'm going to try it and see how it does. If I'm already doing cadence well, I'll probably take it back or sell it (similar to ItsJustMe, below). Their return policy is pretty liberal - they said I can bring it back if I don't like it. Thanks, everyone, for your feedback!