2001 Daewoo Nubira Valves

Engine Mechanical problem
2001 Daewoo Nubira 4 cyl Front Wheel Drive Automatic 80 000 miles

The timing belt snapped and resulted in no compression from cylinder #3. So I assume I have bent some valves. I figure it's just easier to replace them than get them ground. Is this correct? Can I just buy them off Ebay where they are advertised or is this generally unsuccessful? Where should I buy them? (This car is no longer manufactured so parts are difficult to come by)