Amazon, eBay, Etsy — Salestio

Having tried many Shopify/eBay connector apps, this is the one that meets my needs the best. Yes, they all have quirks as they all have different product design philosophies but I suspect I'll be using this app for a long time. (The app has Amazon capabilities but I'm using it only for eBay at this time)

Their support is fast and covers most US time zones.