Yup, what Andy said. I just bought a 7.3FX used. It had about 10 miles on it, literally, for $450 with a disc brake upgrade.
I think another applicable term for "hybrid" bikes is exercise bikes. It's definitely not a mountain bike but it can go very well in the <30 mile range, comfortably; which makes it a perfect exercise bike. I'm very happy with mine, riding in the 10-30 mile range very effectively. Solid, reasonably fast bike.
The 7000 series are more upright sitting by several inches. They're more of a "comfort" bike. The FX series are a bit more leaned over. If your intent is <10 miles, go for the 7000 series. If 10-30, go for the FX. If >30 miles, you need another bike.