I'd say still be a little bit wary of it. I'm going to keep talking to them as you never know when someone may be scamming you. However, if its legit then that's just another step towards them being readily available in the US like the Ayam Cemani!
On Facebook there's a lot of people in the Philippines who will send eggs oversea, however they're incredibly expensive and I don't know how fast shipping really will be because it could just take days for the eggs to become unfertilized. It's why I'm really hoping these people are honest and as far as I can tell they completely are, showing images of their adults however you can never really be sure until it's too late.