For the budget minded, GoPros (or similar) on tripods are pretty popular. Most of the time at those extended ranges, they have one set up downrange pointed at the target and one pointed at the shooter. You can honestly use pretty much any digital video camera for that dual camera approach, I've even seen iPhones being used.
If you're asking about the cameras that can zoom in at those distances with reasonable clarity, you aren't going to pick one of those up on a budget...