I find a lot of razors at yard sales. Some have broken scales, some horribly damaged. However some are quite decent looking. I know from before that basically it boils down to american and germany are the so called best. But how do you know based on the name if the country is not listed? How do you know which razors are worth buying?

I have tried searching online for a razor on the fly at yard sales before, but on ebay similar razors can range from 5 bucks to 100 bucks. So that trick kinda blew up in my face.