We got an email a few days ago from a regular tipster who’s always been right in the past so we’re tempted to give him the benefit of the doubt this time around. While pointing us in the direction of a recent sale on Joralemon Street, he noted that the buyer happened to be a Goldman Sachs executive. This was, he claimed, part of a trend that’s seen members of the city’s most successful investment bank crossing the East River (more than usual) in recent months to buy a piece of the rock in Brooklyn Heights. Another broker we quizzed, who has several Goldman clients looking in the neighborhood at the moment concurred, said he knew of two Goldman deals that have taken place in recent weeks. The only bank where bonuses are expected to rise significantly this season, Goldman bankers and traders are certainly in the best position to snap up those $5 million-plus houses. Think there’s anything to this “trend” or has it just always been so?