I have blue/black, white, and partridge fertile eggs- nearly perfect fertility %. Let me know if you're interested. Keep in mind that to get blue, there's generally a black/blue parent and a white parent. It looks like I have some blue/partridge splash chicks that have hatched recently. ?? Odd color. They're pretty, though. I'm in Maine, btw. I can ship for cost + $3 handling. $8/doz. Or $12/doz and I'll replace any eggs that don't hatch for free (u pay shipping). I've had a great hatch rate on my shipped eggs. No complaints and not a single broken egg.
I think you see a lot of white Showgirls b/c they have that "wow" factor, with the contrast between the blue skin and white feathers. I personally LOVE blue Showgirls- that's my breeding focus. I'm selling out my partridge colors currently.
I'm showing right now, so my egg availability is down a bit. I get a dozen or so eggs every two days at this point.