If it has chips and oxidation you redo the bevel. If it's just a little dull you sharpen it. I've never had something in between.
If those who have honed it before me were any good it may be just a little dull and 8k grit hone would do it, otherwise it needs starting from scratch.

When I buy razors on ebay I just know I'll have to do all the work. The only exception if it comes from an experienced member, like the one I just got last week.