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Never go alone and make sure both of you are carrying.Good reason to carry when dealing with people you meet via eBay, Craig's list, want ads and such. Never know what their real motives are. And if your a buyer, they can assume with 100% certainty that you'll be carrying cash. A few months back I saw two guys at McDonalds sitting at the table by the front door. One guy had some gold/silver, and the other had a scale. It was obvious that the one was buying some scrap gold/silver from the other. Doing so in a busy place like McDonalds also helps deter becoming a victim, but can have the downside that every person who passes by can see what your doing.