I have had mixed results from my ebay purchases, last RIR hatch, 10 out of 12, lovely healthy chicks, last week had a good result with Aylesbury ducks and buff orpingtons, but also have had some rubbish hatches, think it depends on how the postie treats them!! I often bid low, so that it makes it not such a hit when they fail! All mine are put in an incubator, rather than under a broody. Good luck with the hatch, if you manage to get some.