I don't mind selling to noobs but they have to give something for me to evaluate. Recently a 4 year old member pm'd me about a watch. 1 post in his history. I simply asked "tell me something about you, you haven't contributed much to the forum so far, I don't know you, why would I sell to you", basically, do an elevator pitch. He was kind of offended and didn't offer anything back except "Because I don't share. I don't understand the problem. I am a very old user of the forum. Even so, you won't send me anything before I transfer payment. So why this investigation? You don't have to if you don't want to." well, I didn't want to.
But other than that I have sold at least twice to noobs who were understanding of my initial reticency and at least one of those got certified because I told him that would be a plus.