Here are 24 of them, most include XP. ALl you need is a cheap computer for the laser and get a better computer for yourself.http://www.geeks.com/products_sc.asp?cat=813
I would get this one, 134.00 including shipping, XP Sp3 and keyboard, 2 GB ram and 250 GB HD, plenty good for a CNC machine.:http://www.geeks.com/details.asp?invtid ... 2R&cat=SYS
If its to much get another, but I would get 2 GB ram for sure. Especially if you are running more than Mach3 on it.
I have 4 of these, but all of mine have 2 or 3 GB Ram, not 1 GB, they run Mach3 great: http://www.geeks.com/details.asp?invtid ... -B&cat=SYS
If you go smooth stepper you do not need the parallel port. My best CNC machine uses a touch screen all in one(no tower or case), with windows 7 and 4 GB ram running Mach 3 and a smooth stepper. It is way more than I need for a CNC machine so I can run anything else on it I want if I have to. It was only 400.00 at the time, probably less now. Using Mach3 with the touch and having no case is really nice for the CNC machine. If you think abut it even if you get a monitor for 100 and a computer for 150.00 that is very close to the price of an all in one refurbished touch screen with a current operating system, huge hard drive and 4 GB Ram, of course you will need a Smooth Stepper.. I don't run any of my CNC machines that use Mach3 with a parallel port any more, the smooth steppers are just to good.