The biggest of them all, Magento had its glory days some time ago. Released in 2008, it still holds steady.
Let us focus on the eCommerce product that Magento offers. Although robust and very easy to manage, it still needs a hosting provider and a lot of attention.
The existing marketplace will make any online store more dynamic and will help to automate a lot of day to day actions.
Because of the hosting and the setup, the amount spent to keep this platform running for 1 year is $300.
PROS: Easy to deal with, comes with all of the options, good support, big selection of addons.
CONS: Has to be maintained manually, needs a lot of attention.