What they did
The poster, Logan, a long-time collector who already uses Grok Bot to help run a trucking company, had three binders of cards mostly worth $10 to $30 each. He photographed every binder page, labelled the files by binder and page (B1, G1, BL1 and so on) and put them in one folder on his desktop, because uploading that many images straight into the chat was slow and some failed. Grok Bot went through the folder, looked up comps and built a spreadsheet of each card's value, ranked so the best cards could go first. He then took front and back photos of those cards. Grok Bot, logged into his eBay account, priced them and wrote and posted the listings, and it tracks where each card sits in the binders so he can find it when it sells.
How it went
He reports close to 200 listings, 74 orders and $2,616 in extra income two weeks in, and says it got none of the comps wrong. Pulling cards from sleeves and photographing them was the only manual work. The next step, grouping $5 to $10 cards into lots that are worth shipping, has a list ready but had not started at the time of posting.
Worth knowing
Commenters warned that eBay has suspended accounts for bot listing, and one said a new account was suspended after using an agent to list. A safer route suggested in the thread is to have the agent build a CSV for eBay's bulk import instead of logging it in. The poster had no warnings so far but had not considered the risk.