Do you exchange with others your old goods?

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To tell the truth,i often do that.It's really a good way to deal with old goods,i think.For one thing,you can get new goods which is old for their initial owner from others.For another thing,you needn't feel sorry to waste many old goods.Maybe some people will feel it's a shame to do so.But i don't think so completely. What's your opinion,my friend?Doesn't it a good idea?