Best reply to job scam?

In searching for jobs, especially on Craigslist, I keep getting this reply:

Hello
I will like to know if you can get this work done for me, I have 7 Pentium M HP laptops, . Below is a list of work needed to be done on each Pc.

1 Format Hard Drive
2 Install Win Xp with Service Pack 3
3 Install Microsoft Office Package
4 AVG Virus Software
5 Adobe Acrobat Reader
6 diagnose Hardware. Hard drive, video card, processor and what not.

Get back to me with your total cost for the service

I await your urgent response.

Best regards,

Joseph

Now, we all know this is a scam. What would be a good reply to let these deadbeats know we are on to them?