It's not a scam to ask, but it is a scam to sell. Generally people claiming to sell these are sketchy.
Why are you looking for fertile eggs though?
Even if you could find them, hand-raising a parrot from an egg is pretty much doomed. In cases where it has been done successfully, there area almost always mistakes that impact the bird for life. It isn't like raising a chicken from an egg.
You would be better off buying a weaned baby- yes, it is more expensive, but in order to hatch an egg and raise a baby, you will have to spend a ton of money on supplies and feed the baby in crazy intervals-even in the middle of the night (I want to say that early on, it's on the hour, every hour day and night..but don't quote me on that). You pretty much would have to quit your job, and even then, a million things can go wrong. After all of that work/time/money, your baby might not even survive...if it does, there is a strong possibility that it would have life-long issues.
I am not saying that this has never been done successfully, but even the most skilled/experienced breeders would be unlikely to attempt to hatch and raise a parrot baby from an egg.