When people ask me why I don’t watch a lot of reality shows, I tell them life is a reality show, but without a script. “Million Dollar Listing San Francisco,” the fourth installment in the highly successful series, couldn’t be better timed, since little cable cars aren’t the only ones climbing halfway to the stars in San Francisco: Enter three salivating real estate agents ready to move multimillion-dollar properties to the arriviste geeks known as techies. Habibi, the child of Afghan immigrants, partied a lot in his 20s, but now, as a married man with an infant daughter, has cleaned up his act, become a devout Muslim and believes the best way he can acknowledge the sacrifices his parents made on his behalf is to become the top real estate agent in the San Francisco market. Justin Fichelson was born and raised in San Francisco, has an enormous library of social media contacts and has a somewhat annoying giggling laugh that doesn’t seem to put off potential clients. The owners are the architect of the sleek modern structure built into a hillside, and his interior designer wife. Habibi teams up with veteran Bay Area real estate maestro Joel Goodrich to sell a huge mansion in the traditionally tony St.