One reason a lot of people go with Shopify is that it's dead simple to start. $29/month gets you a nice plan for a starting ecommerce shop. There are a lot of nice free themes. You don't have to worry about hosting or getting SSL setup. If you have all of your product data and images you can sit down with your coffee in the morning and have a store up and running by the end of the day. Way before then if your data is in an importable format.