Coincidentally, I had Jury Duty in downtown L.A. for a three excruciating days this week and I visited Ross Cutlery on Broadway. Lots of kitchen knives and shaving apparatus. Some Spyderco and Benchmade but not much variety in anything of great quality. I was all done in about 10 minutes.
I think Advance Cutlery is closed.
Ross is highly overrated, in my opinion. They used to always get high praise in the better LA mags as being "The" place where chefs got their knives sharpened. I tested that theory years ago, and they really screwed up a chef's knife, fillet knife, and utility knife I had them "sharpen". Looked like they used one of those nonsense machines you see on late night TV. I'd say the only notable thing about that business, is that it's in the amazing Bradbury Building, and across the street from Grand Central Market.