Well, yeah. If making money were that easy we'd all be rich, man. Anybody could buy a fish and turn it around for a buck. The problem is that you are paying too much for your fish to be sold. You want fish at wholesale price, then to sell them at retail. Seems like you bought these fish at retail and then increased the price to create your own happy profit margin. Fine in principle except nobody is going to pay that much. Best of luck finding a good wholesaler.