The differnce in sticker price between a base ZX3 (we are refering to the ZX3, right?) with A/C and a "Premium" model is only $585. And that also includes tilt wheel, cruise, 16" wheels, and MP3 player. At least with the Focus you can get cruise without having to buy power locks, windows, and mirrors--many cars won't let you do that. Same for side airbags and ABS. Not quite as restricive as other cars.
If you are talking about the LX, I don't believe that you can get cruise on any LX. What? Those people never go on the Interstate? Silly.