There's no such thing as "legal bud" in the United States. Marijuana is illegal under federal law, period. It may be legal at the state level, but federal law still applies.
That said, it's not actually illegal to own a pipe.
They compress a multitude of different herbs together into a bud shape and are often impossible to roll with due to bits of stem and foilage, I wouldn't recommend spending £30 on sage and oregano.