I've turned down numerous offers of mint. It spreads like crazy. Some plants aren't easily transplanted, so make sure you have a place for them. On the other hand, if you've been wanting a particular plant, don't be shy about accepting a plant from a fellow gardener. Most gardeners I have met are more than willing to share extra plants.
Most perennials have to be dug up and divided occasionally.
Half of my plants have been given to me. It's a nice way to start a garden. All rights reserved. Used under License.