Paypal Question

So Ive seen people on here selling items and saying that they will accept Paypal "friends and family" as a method of payment. Ive only ever sent funds via regular Paypal, so what is the difference, and why would they specify friends and family and not just paypal?
All a gamble IMHO. I've bought quite a few items from members here and thank goodness have not been burned once.

I sent a USPS M.O. on transactions which are like gold here in the States, Canada is a whole 'nother animal.

I do suggest talking to seller as I made a major purchase for serious money on a used/hot 340 from a member. Dealio went well, delivered, running and just now dialing in after install after months of BS on my end.

Unfortunately you do have to put faith in the seller as it might be sometime before you know what you actually bought and paid for.