Brand new Smith prodigy's for $50 good deal?
 

do they fog up? are they good? need answer by tomorrow.

No one can answer this for you because whether they fog or not depends on your face.

If goggles fit well they shouldn't fog, but you have to try them on at the shop yourself to find out if they fit properly.

Pay extra attention to the nose bridge, that's where most people find out their goggles don't fit them properly.

well if they did fit then would it be a good deal?

Yes, $50 is a good price for them. They are the same as Smith Prophecy so if you need lens you can look for either Prodigy or Prophecy ones.

Nothing wrong with them. I wouldn't spend that much on prodigies unless they came with at least two lenses, though.