*Update* For those who may be interested, I bought one of these about 2 years ago and have put about 200 hours on it milling 2D shapes out of aluminum (1/16", 1/8" and some 1/4") 6061 and 5052 and 1/4" ABS. It has paid for itself many times over at this point. A bit about the machine: It is a 6040 from goldraydigital on eBay for about $1700 IIRC, with the black box controller and a 1500 watt spindle, no USB. I run it from a 64-bit PC running Debian Linux and LinuxCNC. So far, other than bits and coolant, the only parts I have needed was some of the little fuses that go in the main AC plug, as occasionally, the ABS will plug the bit, melt a glob around it, stall the spindle, and blow the fuse before I can shut it off. This has happened twice in maybe 200 cuts in the ABS, both times because the coolant line kinked. I have that issue fixed now. I have a box of spare parts (steppers, couplings, drivers, a spare spindle motor and VFD and power supply) but haven't needed anything yet. It doesn't get a lot of maintenance, but I keep it blowed out and apply silicone grease to the slides and ball screws when I think of it, maybe once every month or two. There is no sign of slop or play in anything yet, and it is still accurate to within maybe a thousandth of an inch or so (as near as I can tell). I'm very happy with it, and now that I see the bare machine without the electrics is available, I'll pick one up by and by.