Gardeners, small farmers and boutique backyard nurseries can attract customers with unusual tree, vine and bush fruit crops that offer customers a taste of the exotic, of history, or of their native bioregion that they can find nowhere else. The rare product can be their main crop, or a sideline.
A secret to attracting customers with unfamiliar crops (or with familiar exotics, such as olives, grown and processed in unfamiliar ways) seems to be letting the taste do the selling, and then generating repeat customers from that foundation. Letting customers in on the farm