I purchased an all in one desktop computer, finally. But I bought it used from a Pawn Shop in my area. It's a 19 inch Lenovo All In One desktop computer. The big plus, instead of Windows 8, it has Windows 7 and it's a touch screen. I think I got a deal. I paid $275 each. I also bought exactly the same unit for my daughter.
It came with a wired keyboard and mouse. I'm all about simplicity and needed to stay compact in my tiny office. To stay in budget, I went to ebay.com and purchased wireless keyboard and mouse. So far, they are working and responding pretty good. I'm getting used to the keyboard, more and more, even though I've only used it for a couple of days but I'm really liking it.
wireless flexible mouse
flexible folding rolled up keyboard
all in one desktop computer