ebay & taxes

not sure.. but myebay says i can sell 750 items or 15000 per month. i think ebay is forgetting the cost of goods sold.. the stuff i sell on ebay.. i pay for.. its not junk that i inherited or stole.. I paid for it.. hmmm this is gonna be interesting. plus the states trying to collect $$ for internet sales.. I know in pa, that the pa govt spend millions on a study to find out that they could r*pe consumers more and more.. and more for uncollected sales tax..