You might want to do some more research and find out exactly which type of quail you want before ordering. Bobwhites and coturnix are at opposite ends of the spectrum as far as quail go.....
Why do you want them, in order of most important.... eggs? meat? pets? raising to sell eggs? raising to sell chicks or adults?
Do you know how you're planning on housing them?
Expect around a 50% hatch rate on shipped eggs, especially if you're new at incubating. 6 eggs means 3 chicks which could be 2 males and 1 hen. No way I would order less than a dozen eggs. But really more like 2 dozen eggs. 24 eggs, 12 chicks, 6 females/6 males..... but it usually never works out even like that.