Sorry, new here...NAGD?
Try for off brands from famous makers. A lot of times you can find almost new classicals in pawnshops and music store back rooms. The advantage in your favor is that for some reason even many musicians consider these wonderful instruments to be inferior because they use "Plastic" strings.
There's a few 7 strings floating E-bay from Argentinian luthiers in your price range.
If a 6 is enough hunt for sigma or goya brand guitars. (They've got great sound and because no one knows they're from Martin the price is usually in the 1-200 dollar range.)
I'm moving from pop/rock/funk/tap into ERG so I'm sure to have some useful information after you don't need it any more!
