I wouldn't like to see a remake, I'd Imagine it would be like an interactive advent children.
I love the graphics/quality of VII, and I would hate for the soundtrack to be remade.
If its not broke don't fix it.

I'd say if it was remade, HD and the whole lot, 50 would be the lowest price, I'd imagine SE would cash in on a limited edition collectors item at around 70 - 100 a pop.