If it's really rolled and not chipped, then the cheapest option is to try and unroll the edge. I've done this successfully twice by stropping the razor on the edge of the countertop. My counter has a rounded front edge and I stropped the razor on that until the edge unrolled. Then I took the razor firmly to the linen for a few hundred laps, then to a pasted paddle or barber hone if you have one. It won't necessarily be perfect but it may get you close enough to shave again. One of mine came back perfectly, and the other one still had a little bitty nick but has shaved just fine for years now - you don't actually have to have a perfect edge to get a good shave, there's a bit of wiggle room with small fleabite nicks. You do need to make sure that the edges of the nick are smoothed out so they won't scratch your skin, and that's one of the things the linen does.