It can't be K-mart. We don't have K-mart. We don't have dollar store. We don't have Radio Shack. Actually we have a different version of the Dollar Store, but I couldn't find any tin-snips there either. I can't order online because I would have to pay $500 just for the shipping.
The local hardware store usually has tin-snips. Do you have sears? Craftsman tools rock, because they have a lifetime warranty. If the tool gets rusty, you just walk into the store, grab another of the tool and show it to them, and your good to go. Also snap-on tools have the same type of thing. If all else fails, order online.
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Plus all the stuff that the others have already said.
there ya go :). reasonable price too.