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List unused stuff with a hard floor; human still owns payment creds
Skeptics will not hand payment credentials to an agent — selling is a safer first experiment.
What hurt
Trupti (@truptinatu) ran the same sell prompt on Instinct and Grok Bot: list unused items on Facebook Marketplace, Craigslist, and eBay, set a competitive price above a floor, fill descriptions, monitor inbox, negotiate hard, and only sell when the floor is met. She keeps payment credentials off the table as the skeptic's fence. Grok Bot handled captcha / MFA / rate limits better in her parallel test; Instinct locked her out of eBay once. Tip/workflow with a clear approval fence.
What to install or create
Give the bot listings + floor price + negotiate-hard rules. Let it draft and monitor. You keep payment credentials and final accept. Prefer marketplaces where browser MFA is the hard part.
Bots
Marketplace Seller
Lists items, drafts copy, monitors inbox, negotiates toward floor; stops before accept/sold.
Plugins
None on day one. Follow the first-run steps.
Files
Item photos, descriptions, and a written floor price per item.
Routines
None on the first run. Watch one manual pass first.
The prompt
This is a tip, not a pasteable system prompt. The author did not publish one. Follow the first-run steps.
First run
- 1Read the thread starting at https://x.com/truptinatu/status/2097082179847409742 (1/3–3/3).
- 2List unused items with photos and a hard floor price each.
- 3Tell the bot: list on FB Marketplace / Craigslist / eBay, price competitively above floor, fill descriptions, monitor inbox, negotiate hard.
- 4Do not give payment credentials. Review every accept / sold yourself.
- 5If a marketplace locks you out, stop and recover the account before retrying.
Approval fence
Never hand payment credentials. Never accept an offer or mark sold without an explicit human yes — even above the floor.
What to tweak
Steal the floor-price sell loop and the no-payment-creds fence. Not a license to auto-accept offers.
Source
Trupti @truptinatu · Original post
Not affiliated with xAI. We did not write this prompt. Third-party template terms still apply.