It's a 99 for sure.
Slide plates are cheap.
The machine is in good cosmetic condition, not the kind of shape you'd see with a rusted machine. You wanna see a rusted machine, I've got pics of one and that machine doesn't match.
The case bottom is easily repaired and recovered. So it's a mild problem as well.
This machine is not that bad off as they go. It would be a good machine for someone who wanted one, lots of room to negotiate the price if needed. But if all you're wanting is a machine to flip, skip it.
Joe