I bought cuckoo eggs from this person (not through
ebay). The eggs were packaged beautifully and look a respectable 4. I paid $25 including shipping. His communication was excellent. I have no idea what the cuckoos will look like and did not buy them as show quality. I bought them to hatch for someone who wanted decent laying Cuckoos. So $25 seemed fair to me. I cannot speak for his Copper Blacks.
I honestly think buying eggs on
ebay is a risk and you are competing with folks who are not always in the "know" and linked up to this and other breeding communities. I would caution buying from
Ebay in general for dark eggs, although I know a few sellers have dark eggs.
If you do decide to buy eggs from
ebay. Get the person to commit to the number their eggs are on the scale, learn what the parent stock looks like, and become very educated. If the eggs are not at least a 4, I wouldn't even consider them. If they are not at least a 5, I probably wouldn't want them. Dark eggs just are very rare. If the person is selling lots of eggs, over and over, I would wonder how dark the eggs really are.
I have waited almost 6 months to get some good Marans eggs. I had been researching 6 months before getting on lists and even then, I got impatient and bought from
ebay and another breeder who sent me eggs that turned out not to be "pure". I knew better and in the end, came out ok (got a refund on the
ebay and sold the stock from the other). I am on one list that will probably be at least a year or more. I am okay with that.
I know have a full bator of dark eggs. The Cuckoos I mentioned, some wellsummers and Copper Blacks. The Copper Blacks are only slightly darker than the Cuckoos and Welsummers but the eggs are huge. I know the person I bought them from got them from a highly reputable line and are pure. I have Wheatens and Copper Blues coming from two other excellent breeders. I bought all my eggs through people here or breeders that I have come to learn about through the yahoo Marans boards. Even there and here, there are some less than stellar sellers. It really takes time to find reputable folks. And even buying from a good breeder does not guarantee dark eggs or a show quality bird. These are a challenging breed to work with.
Learn before you buy is my suggestion. Don't jump into it.
Good luck with your decision.