You would think that if you buy something for X dollars, and sell it on eBay at over four times that, you should be making a profit. Maybe - maybe not.
On bigger dollar value products, that quite often may be true but on smaller parts, your basic minimum costs may be too high to turn a profit. Many a newbie doesn't realize this soon enough. They keep buying and selling and after a lot of running around, they have less money at the end of the month than they started with. They wonder how it can be. They eventually learn - but the hard way.
I have put together a spreadsheet that will help you evaluate every product that you sell. Click here to download it. There is no charge.