You can always play with them like I did:
Scammer: Hi,you advertised your camera on craigslist,is it still up for sale?
Me: Yes
Scammer: I will like to buy it for my brother as a gift but....need your reply soon.Thanks.
Me: Sure
Scammer: I just made your payment.....shipping method i paid for.Thank you for
your business.
Me: I shipped it already. Once you get it let me know.
Scammer: Did you send the tracking number to paypal?
Me: Yes
Scammer: Send me the tracking number
Me: I already did. Thanks
NEXT DAY
Scammer: Where is it?
Me: Here you go.
END
lol