Am I self employed (for IRS)if I have ebay sales and reporting the earning?

I have been selling few items on ebay and thru craiglist, mostly re-selling items for a profit. I kept an xl sheet doent of my costs and money received. I have not registered myself as a small business or self employed. I am (planning to report) the income on our tax returns. Does this qualify me as self employed (so that I can claim dependent care deductions, otherwise I cannot claim - spouse works, I have no w2 & turbo tax wont let me add ebay earnings as income for dep care purposes)