A flailing former Citi Habitats sales agent, Leif Lopez, was busted for allegedly scamming an apartment hunter out of $100,000 in a phony transaction negotiated at Starbucks.

Lopez, who was arrested Monday on charges of second-degree grand larceny and is being held in lieu of $7,500 bail, stole $100,000 in cash from a client this summer, according to the criminal complaint. The client believed she was renting two apartments at Rockrose’s Midwest Court at 410 West 53rd Street for a two-year period, but Lopez absconded with the money, the complaint said.

Patxy Peguero, a daytime doorman at the building, said the victim discovered the loss months later when she attempted to move in.

“She came here to move in with this funny lease,” Peguero said. “She was asking me for the key to move in, and I said, ‘are you kidding me? How could you give somebody that much money in cash?’"