If I get a Paypal payment, is it GOOD, or can it later bounce like a check?

[Toller]

I have an item for sale and guy 2000 miles says he wants to buy it and will have a shipping company pick it up. Naturally that stinks, but I don't want to just blow it off.  I have two questions...

1) If he pays me by Paypal, do I know with certainty that the payment is good, or can it somehow fail like a bad check?

2) Is there any risk to giving him my email associated with my Paypal account so he can pay me?  

[DPCreations]

Likely a scam, but maybe not.

More details needed about the buyer.  Suggest you make a phone call to the buyer for more information about shipping.

How were you planning to ship?

How were you planning to request payment?

Where was the item listed?

What is the product?