Updated. VitaCost.com lowers the price of Natural Factors Ultra RxOmega-3 150 Softgels + ResveratrolRich from $84.90 to $32.97. After adding $4.99 for shipping this is the lowest total price we could find by $13. The RxOmega Softgels are a pharmaceutical grade fish oil concentrate to help reduce the risk of heart disease, while the ResveratrolRich gives concentrated antioxidants for more energy and better overall health. Sales tax is only charged in FL, NC, and NV.