20 very costly prisoners, which amount to a thorn in the side. If the current govt wanted him released then he would already be released. The Palestinians will never accept a lesser deal and they will leave him in Jail forever because it scores them political points. For Israel he is an excuse to continue aggressions which the Palestinians know is counter-productive, His chances at release are negligible.
Policeman killed by blast in Bahrain village, interior ministry (Reuters)
from the article: Gilad Shalit video / Footage with full English transcript