Weighs no more than kg n? half,
All have this without any costs.
But this, drag them for many costs,
None?s its alike,
It has many powers,
Can play old n? new records and
Drag to that age or place,
Can even travel to moon without any cost,
Makes an hr to a minute,
And a minute to an hr or for some many years,
If for sale?
Some will get a high value,
Some gets none,
Depends on the usage

By your guessing can know the value of yours?

:-)

U MEAN HUMAN BRAINS?