Sure but I wouldn't pay you anything because I grow my own garlic. I can also get garlic from my friends yard and in the grocery store. Just because it has medicinal value doesn't mean it is good for currency. A currency has to be rare and difficult to attain too.

Gold and silver are rare metals and are not easily mined. They also have medicinal value and other uses in electronics along with other techno uses. So they are a better form of currency and has real useful value.