Messing with a craigslist scammer

So I'm trying to sell a guitar on craigslist. I got a response from some guy that says:

"Thanks for the swift response.please I will still like to make an instant purchase .I would have called but am out of town .so i would appreciate it if you can withdraw the ad from Craigslist.i don't mind adding an extra $30 for you to takethe ad down from criagslist,i want to be rest assured that nobody
else gets a hold of he item.I will also like you to know that i willbe paying via company certified cashier check.It will be overnight
payment due to the distance.i will take care of that.i will need youto provide me with the following infomation to facilitate the mailing
of the check:-

1.Your full name.
2.Your mailing address[residential].
3.Your phone number.
**I am located in Las Vegas but currently on a business trip.I would also like to pay asap and my sister's mover will come pick it up but i
hope that it is still in a very good condition?Have a splendid week"

Here is my response to him:

"That sounds good, as long as it's a certified check. However, before I give my information, I would like to make sure that this safe. Could you send a picture of yourself? To make sure it's you, I'd like you to hold a sign that says "Fluffhead", with your ID in the picture to prove that you are who you say. Also, I would prefer to meet with your sister as well as the mover, could you include a picture of her? I want to make sure that I'm giving my guitar to the right person.

You have a splendid week as well!"

I'll keep you updated.