KRAMER150
The buyer told his cc company that the charge was not authorized. (but waited until the last possible minute of the 3 month period to avoid getting caught in non - reversal) The CC company reversed the payment to PP. PP reversed the payment made to the seller (my son). Basically, a major cc company trumps PP, and PP trumps my son.
The idea of not keeping money in PP is fine, until you are a regular power seller and do a fair amount of transactions.
Your idea of always using visa to make your PP payment protects the buyer, but not the seller, even if the transaction was 100% perfect and goods were delivered in 100% perfect condition with proof of delivery.
Aluminus - I am not an E Bay regular, but the way I understood it, the seller's ability to file a complaint against the buyer for non payment expires 90 days after the transaction, or something like this. Since the seller waited until just around the 90 day period to do the CC reversal, my son was not notified until just at the 90 day point. A few days delay on his part trying to prove delivery confirmation put him over the limit for a complaint.
Happily, this has not happened often, but it is one of the areas that makes a seller uneasy, esp since the fees are not insignificant. Probably, there is no perfect system, so people will alwasy find a way to do something "funny".