Neither have original jaws.
These are probably not D688 model - they look short - so either D675 or D660. Probably the later. New D688 latest equivalent on sale is around 650-700 CAD so a new D660 is around 500-550 CAD. Since these do not have jaws I would think 250 each would be fair - but I feel there are people out there that would give you far more - like 350 or even 400.
I assume these are 6" wide jaws.
The red set of Chinese prallers used maybe is worth like 30 at most.
Not sure what you have at the top - parts of the original jaws? One of them looks like a grove that one of the original jaws has.