The pile of night stalker eggs is a quest item in Fallout: New Vegas.
It is a quest item for the 4th part of Bleed Me Dry. Red Lucy of The Thorn will offer 700 caps for them, or 1,000 with a Barter check of 80. It spawns once this part of the quest has started.
The pile in which the eggs will spawn at Bloodborne cave, which is full of night stalkers and one legendary night stalker.
The marker points out the exact location.
Collecting the eggs from this pile is not the only way to complete this part the quest, she can alternatively be given any 12 nightstalker eggs.