The listing, Sweet Williams, seeds ~30-50 qty, mixed colors has ended.
Sweet Williams are a biennial which self sow readily so you'll always have them around just as long as you allow a few flowers to go to seed. They stand 1 1/2 - 2 feet tall, they tend to sprawl on the ground and prefer full sun but will tolerate part shade. They like any soil and are drought tolerate. I'll send 30-50 seeds, they are too tiny to count. That's enough for dozens of plants! For more info on these sweet smelling flowers go here: http://www.self-reliance-works.com/2012/06/frugal-plant-profile-sweet-williams/