I have a feedback score of 100% and a trade count of around 450 for both sales and purchases.
Never had a hassle yet, and one bloke who didn't send me a $20 item, I got my money back thru paypal.
Having said that, I would find it very nerve racking if I sold a pinball machine for say 2, or 3 thousand dollars, and some tosser tried doing a chargeback etc.
This is where u can quickly lose all your money because paypal is instantly on a buyers side. So u have to make sure u have support emails, acceptance letters of photos, condition report etc.
BUT, Mike is totally correct about Paypal, all the buyer has to say, is the item arrived damaged, without having to provide any evidence, and u get a full chargeback n lose your money for the pinball machine you sold via ebay with Paypal.
If u can swing a bank deposit for large amounts of $$, u are much much safer.
