Hi there, welcome to BYC!
Folks can only ship legally if they are NPIP certified. Also, even if your state isn't important... we have member from the UK, Canada, Australia, South America, etc... So adding at least your general location to your profile can help folks make the best suggestion possible at a glance in the future.
No private breeder can accurately sex BCM. I bred them for a few years and they were fairly good birds!
Egg color was fairly good, birds were decent but not perfect.. but lets be real, I haven't seen a whole lot of perfect birds... It's been a few years but here is one place I got some of my genetics... Service was excellent.. when chicks didn't arrive on time she tracked them down and SOMEHOW talked the postmaster into adding water inside their cup, which I believe made a huge difference.
https://www.northwoodspoultry.com/
You might also try...
https://www.alchemistfarm.com/black-copper-marans/
Best wishes on your adventure!