There are lots of online kitten scams.  Listed below are some scam websites that we are aware of-

Silver Blues Cattery

 

Blue Triangle Heads Cattery

Feli Cattery

Gemstone Blue Cattery

Exclusivekittenbreeders

DRussianBlueKittens

DimaCattery

Agathasbluekittens

Adamscattery

Likely any breeder listed on Hoobly or Craig's List