Hello there!
From what I can tell (a bigger photo defintely would have helped...) this is not LEGO! A can't spot a single true LEGO brick.
These bricks shown are even from different brands. LEGO bricks always had solid studs with their brand name on it. Here you can spot hollow studs ore solid stud without branding.
The underside changed in the age before the 70's, but after that they had tubes, not a plain underside as can be seen in the white and yellow bricks on the bottom.
I cannot tell what the blue part in the middle is - I don't think it's a building brick at all... (looks like Bloko)
So either these bricks are very old (pink wasn't a color of that time) -> don't buy them
or
these bricks are not genuine LEGO -> don't buy them!