I tend to have far too many things that I need to find homes for, so I decided to start a thread which I can add to, as necessary. I'll use the edit function to indicate when an item is no longer available.
In general, I'm trading for postage, which is typically Priority Mail, at the 1 pound or less scale. Sometimes First Class Parcel, which is 2 or 3 dollars less. Also typically less for seeds, and sometimes for cuttings. The idea is to ship things cheaply at cost.
Feel free to offer a trade, although don't be surprised if I reject it. In terms of a trade for something particularly interesting, bear in mind that if I'm offering something for free, chances are I have more of it available.
I'll restrict some items based on location or growing conditions, as I grow a lot of plants that are cool growers, and will die a quick death outside in most of the country.