Not saying don't proceed with caution, but most of the time ARFCOMMERS are gtg... most of the time, specially the paid ones ;)
Can usually ship long guns and shit from private person to FFL without issues, some places and situation, and firearms, etc etc etc.... will require the person shipping to go thru an FFL to be sent to an FFL on the other end, but that is usually an issue with your FFL holder, not the guy shipping it to you. Some FFL holders require you ship it from an FFL on your side, over to FFL at the receivers side, or vise versa, I think some states or Handguns it's required as well but don't quote me.
+7 is a pretty solid feedback number, all things considered. Just dot your T's and cross your i's you should be fine. :)