I have been selling goods, using PayPal as my only payment option (well, that and money orders) for about 4 years now.
My account is a "business" account, so I can accept larger payments and credit cards (note I said "ACCEPT", not "Except"

). I do not have a bank account "linked" to it, but I do have a bank account that I can transfer funds from Paypal to.
I primarily sell through a website, not Ebay, so maybe my testimonial isn't that useful to you, but I have only ever been ripped off once, and that was by misunderstanding. A woman in Singapore ordered one of my games (CD-ROM). It takes over a month for a shipment to get that far, because I use cheap postal shipping. She started inquiring "where's my game?!", but my replies to her were not reaching her (I think she had her reply email misconfigured or my emails were being spam filtered, I forget the exact problem). So she initiated a "non receipt of items" complaint through Paypal. Unfortunately, there was no way to prove to PayPal that I had sent the item, since you do not get a tracking # for the cheap method of shipping. So eventually the woman got her money back, and presumably got her game too.
My items are small ticket items, so I can swallow such a loss. It happens so rarely, so I still use cheap shipping to make my goods more appealing to people ($2.50 shipping! Cheap eh?)
If you're selling large or expensive items, then just make sure you use a shipping method with tracking.
~Ray B.