Some concerns about Paypal:
They have frozen accounts without warning or explanation. I'd suggest that you immediately transfer paypayl funds received into your bank account, rather than keeping them in paypal.
People receiving funds don't get all the funds; Paypal skims a commission fee. That sucks if you're an Ebay seller, since you've already paid Ebay's commission too, and now you gotta pay Paypal too.
They're not FDIC insured.