want buy new or second hand cnc

[Swarfing]

Just have a look on Ebay buy through that route, ther have been some good reports of the machines. Things to look out for are only single scews on the X axis so always ask if it has one or two. Two is always best :-)

First though is think about what you want to use it for? there are plenty of vids on youtube showing these things off so have a good look there first.

[Swarfing]

Here is an example of what you could buy? not that you would necessarily need a double head.

http://www.ebay.co.uk/itm/NEW-Double...item19b7b56c6d