Selling etiquette

I should have asked sooner, but I've been a member for about 10 years. Never really sold much. I don't even have a score. So, if someone has a low trading score( in the 70's) ,and most of their posts seem to be buying, and selling, and they ask about a postal MO, should I be concerned?
Also, is PayPal friends and family ok to accept from a buyer with a 100% score who's been around a while?
Not trying to hurt anyone's feelings, but I do want to protect myself.
Best to use PayPal good and services to protect yourself when buying. The small extra fee is like buying insurance. If they want to pay you by friends and family, it’s their risk...not yours. It’s OK to accept it. Same with postal MO, cash it before you ship and all is fine.