I inherited two older Craftsman cross cut hand saws almost 30" long including handle. The handles even have engraving on them. One has a red shield on the points the other finer cut has blue. I can see a couple uses for them and already used the rough cut once and it came in handy. But they are both dull. I'm not up on these types of tools. Are they worth spending $$$ getting them sharpened? What does sharpening saws like that cost? Can I do it myself (if it's not real difficult or terribly time consuming)? Where would I look to find someone to sharpen them?