Useless Baubles or Fancy Trinkets?

Useless Baubles or Fancy Trinkets? is an unmarked quest in Fallout: New Vegas.

Quick walkthrough
First, visit the Lucky 38 and after talking to Jane, the player character will be able to sell their snow globes to her for 2,000 caps apiece. They will then be displayed in the Lucky 38 presidential suite on a stand. When the player character finds a snow globe in one of the add-ons, it will automatically be transferred to a shelf in the presidential suite and the player character will automatically receive the 2,000 caps.

Detailed walkthrough
When the player character first visits Mr. House in the Lucky 38 penthouse, they will be greeted by Jane, the securitron immediately in front of one as one exits the elevator. She is also the only securitron with a woman's face. To give her the snow globes one must exhaust the dialogue option "What's with the snow globe collection?" and then state, "I have some snow globes for Mr. House's collection." Note that if the player character kills or disables Mr. House, she disappears. There are seven snow globes in all, excluding the add-ons. Jane will give the player character 2,000 caps for each snow globe and, after selling them, each one will be added to a display stand in the presidential suite.

Locations

 * Goodsprings Cemetery, near the water tower and next to the only non-oval-shaped grave.
 * The Lucky 38 cocktail lounge, hidden behind a cash register to one's right as one enters the lounge.
 * Vault 21, in Sarah Weintraub's room. Walk through the Vault 21 gift shop into the Vault itself. Go down the first and second staircases, turn left, move down the hall past your the player character's to Sarah's and pick the Average lock, keeping in mind that the player character will lose a minuscule amount of Karma. The snow globe is on the nightstand directly in front of one, in between the two beds.
 * Hoover Dam, on the counter inside the visitor center.
 * Nellis Air Force Base, in the Nellis Boomer museum, on a desk to the right of the door.
 * Jacobstown lodge, sitting on the reception desk, (the same building that houses Dr. Henry's clinic).
 * The Old Mormon Fort, in the corner tower. It is located upstairs, in Julie Farkas's room, on a shelf.