List a box of used books for sale with Grok Bot on a local marketplace

Try it yourself

What you get

A marketplace listing built from box photos: titles, collage and sale copy you approve before it goes live.

Tools

• Grok Bot
• Photos of the books
• A marketplace account you already use

Time / cost: Not stated; author reports some sales after posting

Steps

1. Shoot clear photos of spines and covers.
2. Have the bot list title, author and draft price bands.
3. Approve the collage and copy before publish.
4. You handle payments and meetups.

Copy-ready prompt

Here are photos of boxes of used books I want to sell on [MARKETPLACE]. Identify each title and author you can read, build a cover collage, draft listing text with condition notes, and propose prices. Show me the draft before posting to my account. Do not message buyers until I approve.

Prompt written by AgentPlays, based on @MontanaSeptic’s post. Check the output yourself and approve before anything is sent or bought.

Watch out: Marketplace rules and local sale laws still apply. Approve prices and meetups yourself.

Proof / source

Self-reported Author's public X post with FINN.no listing photos (Oct 12, 2026). Self-reported.