I have used PayPal for both making and receiving payments for items sold through this board.
There have been a few glitches, but those were mostly user error ones - such as not using the correct "address" for an account.
A buyer pays nothing for the transfer. A seller pays fees - last year (I wasn't able to open the window for fees right this minute) the fees for me were $0.30 per transaction, plus 2.9% of the total payment.
On a $1.00 transaction, this is how it would go:
The sender sends $1.00 to me.
PayPal deducts $0.30 plus $0.03 for it's handling fee.
I ended up with $0.67
The fee was more tolerable on bigger transactions, but it really "hurt" on the very small transactions.
If one has a very high volume of business, the rates are lower.
The plus side - one could get payment right away if the buyer paid right away.
The plus side for a buyer - no postage to pay