Most "true" macro lenses (i.e., those that can achieve 1:1 magnification; that is the image on the sensor is the same size as in real life) can double as extremely sharp portrait lenses, since most of them are f/2.8 longer primes. However, they'll cost quite a bit more than "a few hundreds" (most seem to be in the $400-$1000 range). There might be some lenses in your budget from the 3rd party makers like Sigma, Tamron, or Tokina--but be careful of 3rd-party lenses marked as "MACRO", as some of them do not achieve 1:1 magnification. Any zoom lens (i.e., one with a variable focal length) that's labelled as MACRO isn't going to be a "true" macro lens.
But you're probably better off looking for a good portrait prime in the 50-135mm range, and then adding extension tubes, close-up filters, or reversal rings to it. These are the time-honored "poor man's macro" methods. They are not as easy to use as a true macro lens, since you can't choose your framing and then focus, but rather you focus by changing the camera-to-subject distance, as these methods tend to restrict the distances at which the lens can focus. But they also don't cost as much as a good macro lens will.
