This isn't really a "true" F, they call this the Model C. It has a plastic case and if not shipped correctly can be easily damaged in transit. It also doesn't feel nearly as nice as an F XT/F AT or 4704 Model F. On the upside, these almost always have solenoids, and this version has the numpad on the right (some do, some don't). It's probably about $15 too much, but the free shipping is nice. Good keyboard for Model F parts and/or solenoid if you need those. It can be USB converted but for me at least it's not worth it.
This looks oddly like the same Model C I sent back to a sender after only receiving one of the two units I ordered. I guess the connectors are very prone to bending.