eBay sales

I understand from a previous response that hobby losses on eBay are not deductible.  Everything I sold was at a loss, either sports gear or auto parts.

 Is the amount I was paid by eBay all considered income to be added in to my total income, or can I deduct the cost of the item to off set the income.  ie.  If I sold something at $75.00 and it cost me $100.00. Can I document this so I do not have to include the $75.00 income but not declare it as a loss?

thank you