Accepting Craigslist payment via PayPal

[tahoedrew]

It's been years since I've sold anything on eBay and used PayPal. I have an "L" series Canon lens I'm selling to a guy in Chicago via Craigslist. Appears legit as he's got a website and everything and responded with an email that had a signature line that included phone number and website. What do I have too look out for in terms of getting the money and making sure I actually HAVE the money before sending the item?

Thanks,
~A