Powerbuyer is built and run by Michael Macintire. I started buying jewelry on online marketplaces in 2011, switched from collecting it to reselling it during Covid, and have been doing some version of this work full-time since. Sourcing on Etsy is part of my day-to-day. Powerbuyer is the tool I built because Etsy's native search isn't built for sourcers. I use it every day, and there's no team between you and me. If you hit a problem with the app, I'll be the one fixing it.