Quoted from frolic:I've processed hundreds of thousands of dollars with them
I truly hope you're pulling this cash back into a regular bank account when you can. I would not leave that much money w/ paypal. They're not regulated as a bank, they have no FDIC insurance, and can hold your money for almost any reason. Unlike checks they reverse transactions if they get complaints, which means money you were 'counting on' can just vanish if a deal goes sour.
I can't emphasize enough, eff paypal. If you must transfer money online, use Amazon Payments. If you must swipe in person, Square 100%.