I've got a Gary Fisher opie I'd sell cheap. It's a hardtail aluminum bike. It's a complete bike except for the front brake. I took it off to ride my pump track and then I lost the brake and lever. The frame has disc brake tabs for future upgradeability, but it's never had discs before.
It's kinda heavy with a cheaper front fork, but it's a solid bike with some upgraded components. It's got an XT rear der, tru vativ hussafelt cranks and stem. I'd let it go for $100. That should give you some leftover @ to cover the cost of a front brake and lever and then some. It's sized to fit someone 5'5-5'8. It's red and unfortunately I don't have any pictures, but I might be able to get some. I've been looking for the right home for it.