I've had decent success buying fertile eggs... and I've had folks that have had success with the fertile eggs I used to sell.
That said, here are the names of some breeders that I've had success with here on BYC.
Dipsydoodledoo: BBS Ameraucanas
Chookschicks: French Black Copper Marans
pasofinofarm: W/BW Ameraucanas, FBCMs, Golden Cuckoo Marans and Salmon Faverolles
pips&peeps : W/BW Ameraucanas
Wayne Meredith: W/BW Ameraucanas
Peachick: W/BW Ameraucanas (bluest eggs there are... I'll be hatching her eggs for Easter)
bargain: speckled sussex, Easter Eggers, Leghorns
Hot2Pot: Polish
The Sheriff: Icelandics
NotaFarm: Icelandics (I'll also be hatching her eggs for Easter)
kathyinmo: Silver Laced Wyandottes, Heritage Barred Rocks, New Hampshires, Icelandics
BostonBryce: FBCMs, Icelandics. (great fertility)
I currently have 36 eggs in the bator, 32 purebred w/bw Ameraucanas and 4 Olive Eggers, 21 came from WhiteMountainRanch and the rest from my coop. Can't wait to candle on Saturday.