Sounds like it wouldn't work for you given your price point, but for others who may be wondering, I'll mention the newer NEX-5R (as I just did in a similar thread w/r/t the NEX-6 vs NEX-7).
I chose it for use with manual legacy glass over the 5N. They are essentially identical -- same body, same sensors, both have touch screen live view zoom, no color issues with wide manual glass, etc. -- but the 5R adds a shutter speed dial (like those on the NEX-6/7) and function button that make shooting with old lenses much easier. Is it worth the approximately $250 additional cost for a new 5R over a used 5N? I don't know, but I took the long view and chose the one that would work best for me. Of course, as they filter into the used market and new bodies emerge, the cost difference will narrow.
With the high ISO capabilities of these cameras, I've settled into shooting on auto iso while easily changing aperture (on the lens, of course) and shutter speed (on the nice, big dial) with ease. Manually adjusting ISO requires just a tap of the right side of the wheel and spin without moving your finger. And the function button makes it quite quick and easy to change WB, choose black and white (it's really cool to see shots on the LCD that way, and it does a really nice conversion with no editing), etc.
Heck, with the small lens lineup I settled on -- PEN 20mm/3.5, Voigtlander 35mm/1.4, and collapsible Summar 50mm/2 -- I can easily shoot fully manually with just one hand. (Put my thumb on the shutter, index finger on the lens, flip up/raise the screen, and hold at waist level.) And the whole setup fits easily in my jacket pockets.
