That's why I asked for the domain publicly. I don't feel comfortable sending strangers PM. Also, I don't understand why can't he share it here, assuming it's not anything illegal or scam. Red flag...
Even it might have a good domain but to be a scammer. There are many legit domains these days owned by scammers. Some scammers have old domains now when they know people easily know that they can not trust their new domain. Even having a legit domain, it is good to just stay away from the person.