My fellow head shavers. Is there a razor (manual) that you've found can survive more than 2 shavings?

Maybe I’m just buying crumby razors, or my hair is too think, but I can’t find a razor that can withstand the pressures of shaving my head more than a couple times before it starts doing more harm than good. I’ve tried most of the “middle of the road” razors – the Gillette 3, the Schick 4, etc. I’m about ready to give up and just buy a bunch of low end BIC single blades and figure “oh well” if they only last one shaving. I even sometimes use an electric to “pre-shave” but this doesn’t seem to help.