Jousting a Gumtree scammer (I think)

I love the concept of Gumtree and because I invariably sell locally I have never been scammed, though sometimes I have suspected the motives of some who send messages.

Today I posted an ad to sell a guitar I no-longer have space for and in less that a minute a person purporting to be 'Z' messaged me. This to me is suspicious as they responded so quickly; was I indeed so lucky as to be posting something that someone wanted just at the same time they were browsing? I think not. Here is our conversation.

Z - 14:13:    Hi, is this still available? (An early response!)

Z - 14:14:    ??

Me - 14:35: I have just posted the ad Z, so I guess it is still for sale. 

Z - 14.36:    Email my mate he'll be really up for this. His email is ........

      Z tempting me to use my email system outside of Gumtree to get my detail.

Me - 14.38: I'd rather you tell your mate so they can take a look.

Me - 14.38: I'm thinking you're a scammer. Do you want this or not?

Z - 14:38:    Lol.

Z - 14.39:    I'm not mate.

Me - 14.39: Not interested or not scamming?

Z - 14.40:    I'm in Luton. Can you come over with it?

Me - 14.40: Too far for me and will not post as guitar big and high value.

Me - 14.41: Is your mate in Luton or nearer to me (see map).

Z - 14.42:    You mail him he might come and see it. What's your number or address?

      Z is phishing for my telephone number or address now.

Me - 14.42: To speak to me your mate must contact me through Gumtree.

Z - 14:43:    He isn't on Gumtree yet.

Me - 14.43: He should join - It's good. 

Me - 14.45: We're getting nowhere Z - too far apart -  this is the end of our line.

Z - 14.46:    What do you mean?

Z - 14.46:    I really want this guitar and will wire you the money and pay postage.

       Z attempting a quick sale unseen so he can complain about damage later.

       Z might be in America as few in the UK wire money - we transfer.

Me - 14.47: Goodbye Z.

Z - 14.50:    My mate will contact you about this.

       Z trying to disrupt sale as I don't know his mate's Gumtree ID.

Me - 14.55: Bye Z - go phish and scam elsewhere.

Me - 14.57: Deleted Conversation.