FWIW
I am using an Epson Stylus SX515W Colour Ink-jet - Printer/copier/scanner, with Windows 7.
It's an all in one scanner/printer/copier.
As it's wifi enabled, I don't need to connect it directly to my PC (can if PC not wifi enabled). It can also be used as a stand alone copier, B&W or colour, without the PC being turned on.
It has a reasonably good scanning capability (not quite as good as a stand alone though) and my A4 B&W scans are most acceptable.
Prints are equally good.
As it takes individual colour cartridges (I use cheap compatibles purchased over the internet) it is very cheap to run.
A quick Google search brings the cheapest in at £50 GBP.
I don't know of the availability in your part of the world, but at these prices it's almost a consumable which can easily purchased over the internet.
If I can set it up/use it, it must be quite simple and easy.
As I've had this for 12 months now, with no problems, there may be an updated model with even better capabilities, but my 515 still appears to be available.
HTH
G.