As with any of the older vehicles, maintanence is required. There's the old "glass tranny" stigma that earlier WRX models have, but that shouldn't be a problem since you aren't planning to mod. Most WRX owners have modified their cars and switch back to stock before selling it and this is especially true for manual transmission models. There's too many variables to suggest things like how many miles are too much or how much xxx car would cost, so I suggest looking at the classified section to see what cars usually go for.