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As you suggested, I added the income on Schedule C and also did listed expenses (postage, eBay fees, PayPal fees, etc.)  Where do I account for  the original cost of the items?  Since this is like a garage sale, the items I sold are various used things from around my house.  I did purchase them at some point in the past but have used them so the value is far less than what I purchased them for.  Presumably I should not end up with a profit since I purchased them to begin with.  

Thanks in advance for your help!

@LenaH