They look complete with bench mount bracket and leaf spring.
The handles are in pretty good shape too.
If the threads on the screw AND in the "box", or internal threads in the 'nut', are OK, I would jump on them if the price is all right.
Maybe $125 or so for the pair is a pretty good price.
They should get that on fleabay but you would have to add shipping, which is often another $50 each.
Heavier us usually better, so the upper one in the picture is the more desirable.
Of course price is whatever they are worth to you.
After all, they are right in front of you with no shipping.
If you can get them both for a good price, and you don't have room for both, you shouldn't have much trouble selling or trading.
I'm in Kentucky and I already have nine leg vises, but for $125 the pair, I would snatch em'.
They squarish form of the legs suggest that they are later models, and should have lathe turned threads.
That's a good thing.