'Ghost Adventures' Star -- People Scare Me ... I'm Flipping Out

There's only one thing that terrifies "Ghost Adventures" star Zak Bagans -- nosy neighbors ... so he's put his $2.6 mil Vegas mansion on the market.

Our real estate sources say Bagans is ditching his 5 bed, 4 bath, 5,800 sq. ft. house after 10 months because a ton of new homes are popping up in the neighborhood -- and he's worried about losing his privacy.

The desert pad is phantom-free -- unlike the haunted home that took nearly 2-years for him to unload -- so he thinks he can flip it quickly, and make up to $500k on the deal.