You may bring gifts or new Items into Israel but they total value of the products may not exceed 300 $ in value.
The Israeli customs officials make great use of there privileged to evaluate the items according to there handbook..
If you bring items into Israel which are not in there original packaging even if there for personal use but exceed 300 USD of value
you have the option to declare them and pay the over prices tax, other wise if you get caught they either confiscate the items
and you do not have to pay a fine, or you have the right to pick it up the next day and pay taxes and a fine which is usually the value of the taxes again...
If you bring HUGE amounts of stuff into Israel, like 20 Iphones or so (commercial amounts) you will or can be indicted !