Why possible reason would you have to buy that piece of junk?

- Go read "The Vises of Garage Journal" thread and learn something...
To the OP:
That is a decent vise, but not a really heavy duty good one.
There are:
Very light duty "Homeowners" vises, with exposed screws, that generally go for $1-$15
Medium to light duty vises l
ike that one, with covered screw, but the slide is a stamped steel channel, that gets pressed/cast into the dynamic jaw; worth generally $5 - $40, maybe $50
Then there are the Machinist and other heavy duty vises, that have one piece cast, (sometimes forged - rarely) dynamic jaws. generally those go for $20 - $100 or more in the case of the really big ones, (above 4"wide jaws mostly) or the bullet Wiltons and other highly sought after vices. Sometimes the sky is the limit on those.
Specialty vises can't be easily priced as they can be all over the map, from dirt cheap to "you want HOW MUCH?"
Weight is almost everything to a vise and in a given jaw width size, heavier almost always = better
The general exception to the above guide is the run of the mill import Asian vises. (Easily spotted as they almost invariably have chrome plated handles, main screw heads, and swivel handle/nuts, and are often bondoed to cover casting imperfections,and painted some variant of hammertone (copying Wilton?

). They are also incredibly light for their sizes... They also commonly have a big "4", "5", or "6" cast in the dynamic jaw. Those are not worth anything above scrap price IMO.