18...I don't know where you got the last eggs but I do have experience with some of the ebay sellers not being honest about the freshness or health of their flock....there are a few that must have unhealthy flocks because either the eggs never hatch or the chicks are weak if they do!The only way I can get eggs is to have them shipped again though. It makes me nervous.
That is the type of bator I have.
So when my bator says day 1, it has been a full 24 hours. So do I put them in lockdown when it says 18 or 19?
it's not as hot now so maybe it's a better time! but beware it is still 50% or less....if you can find a breeder that's closer and the eggs don't have to travel too far maybe! I know of some breeders on ebay that I'm thrilled with if you want they're handles I'll look them up...the last polish I hatched 5 out 6 eggs!! that's unheard of for shipped eggs...