I'm trying to hatch a batch of shipped silkie eggs right now too. Given the harder hatching rates of silkies, I pretty much figured if I got 1 out of 8 eggs, I was lucky since shipped eggs do alot worse to begin with.
I may order a batch of 24, to try a larger variety to see if I can get a few more...
What kind of bator/humidity are you running at? I've had pretty good development so far in a few of my eggs, but i'm keeping the humidity around 45-55% - I let my cochin eggs sit with 30-40% humidity. The two viable eggs I had in there formed, 1 hatched, the other never made it out of the shell because it was upside down or something. (hubby opened it up to find out.)
The silkie eggs, the two with the worst air cells that were shipped, had blood rings show up with in the first 3 days of being in the incubator. So, I was shocked when we made it past day 8 with 3-4 still viable looking. (2 were unfertilized.)
I'm still figuring out the best way to handle the silkie eggs, because they seem to be pretty temperamental.