It may have shed the outer of the harmonic damper rather than snapping the belt. (Something to watch for if you own this model - mark it to see if the rubber is letting go) It's an early example, has done 270K, it's got some body damage and there is a reserve set for it, so the economics are probably rather suspect. However, you may get lucky and find it's just snapped a few of the rockers and the valves are OK.
Edit - Missed the bent piston bit??? = major work and you'd probably be better off with a used engine.
270K eh. I'd be very wary, even at $10. There are plenty of good secondhand cars around that don't need fixing. And the need for major item fixing can sometimes come from neglect (of everything) as well as from bad luck.