If you are selling something over $600 from a private person, you may want to ask the buyer to give you funds in $500 chunks.

Otherwise, you'll be paying taxes.

If you sell something on ebay for >$600, you then are screwed.


Start tracking what you pay for goods so you have a basis for what you paid for the item so that you only get taxed for the difference (zero taxes if sold at a loss obviously).