I would personally prefer a decentralized storefront tool for Steem Engine tokens vs a centralized store (ala eBay). If someone has the time and ability I would love to see SE support added to the WooCommerce Steem Payment method plugin.

In case you're not familiar this plugin allows anyone to create a store on a basic WordPress site using the open source program WooCommerce. The end user simply defines the destination address and the plugin will create and monitor for memos in Steem transactions allowing users to simply pay via SteemConnect. Originally created as an open source project by @recrypto it's been maintained by @sagescrub for a long time now. I reached out to @sagescrub about adding support for SE tokens towards the later part of 2019 but he didn't have the time to look into.