Commerce Manager (157 USD, or 7 days free trial then 3 x 53.70 USD (you can cancel your future payments at any time))
You can try Commerce Manager for 15 days. Configure your options. Add your products. Sell them. And if, for any reason, you're not satisfied, remove the plugin from your website, contact us and we will refund you fully. You see, we take all the risk for you.
By getting now Commerce Manager, you will get all the future upgrades of this plugin, even when its price increases. This will allow you to benefit from new features in addition to many features included in the current version of Commerce Manager. You can install it on each of your websites. You can also modify it for your personal use.