Shopping & Errands
Negotiate Facebook Marketplace purchases with sellers
A user set up an agent to lowball sellers on Facebook Marketplace, and it reportedly negotiated a Jeep Wrangler for $1500 plus a PS5 and three TVs.
OpenClaw
Build an e-commerce agent with OpenClaw
Poster spent 100+ hours and 200M+ tokens building an e-commerce workflow agent with OpenClaw; post focuses mostly on the build effort.
Time saved
Not reported
Setup time
Not reported
Running cost
Not reported
Cost range
Not reported
Use case overview
Poster spent 100+ hours and 200M+ tokens building an e-commerce workflow agent with OpenClaw; post focuses mostly on the build effort.
Reported experience
What they did
The poster built an e-commerce agent in OpenClaw on a sandboxed VPS, using Telegram rather than Discord, Kimi K2.5 as the main model, and a cheaper model for heartbeats and background jobs. They gave the agent a linked markdown memory system, sub-agent templates, and decision-tree instruction files it only opened when needed, while they manually restarted the gateway, tweaked configs, and brought in stronger models like Opus or Sonnet when troubleshooting.
How it went
After 100+ hours and 200M+ tokens, they say they finally got a workflow running reliably enough to use. The main shortcomings were high token burn, background costs, and destructive mistakes like wiping files or even an entire VPS when permissions and boundaries were too loose.
Worth knowing
Their stated operating cost was about $10-15 for a full workday of prompting, plus roughly $1-2/day if heartbeats ran on a pricier model.
Example prompts
Help me build a small e-commerce workflow agent for my [store platform, e.g. Shopify] store. Start with one job: [e.g. checking inventory and drafting supplier reorder emails, or updating product listings from a spreadsheet]. Finished means one working run on [3 sample products] with a short summary of what it did. Pause and show me anything before it sends a message, changes a listing, or spends money.
Related use cases
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Shop Etsy for party supplies within a budget
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Call local stores to check toy stock
A writer used Gemini's calling feature to phone local stores about a Labubu figure and got text or email summaries of availability, price and hours.
Gemini