Twentieth Century Props in North Hollywood is giving up because of the recession and Hollywood labor strife after almost 4 decades in the biz. The owner told the Los Angeles Daily News his vast inventory used in some of the biggest movies and TV shows will be auctioned off over four days in July. The collection includes the 20th Century Fox Studio prop department that was bought in 1994. Among the items are facades from Independence Day and Titanic. “I expect collectors will have a field day tripping over themselves for some of these things,” said the owner.