Garlic bulbils are fine, because they don't get crushed in shipping. I got 2 pounds of garlic and a half pound of new bulbils this year from the packet of seed swap bulbils I scatter-sowed 2 years ago. I scattered all my new bulbils this summer, and have little garlic plants springing up all over now.
I have a bag of Royal Sunset lily bulbils in the refrigerator (chickpea size and smaller), but I doubt they would survive standard seed swap shipping.
