Katherine here (ShopLocket founder). I'm not sure if its the reduction in technology costs, something like ShopLocket has been possible for years. But what I do think has changed is that its no longer a leap for the average person to consider selling online. They have the social networks and distribution channels to do it on their own.
Not to mention, with solutions like Shopify and services like Pinterest rising in popularity, expectations for what product should look like online have risen. eBay and Craigslist just won't cut it anymore.
