Seller Prompt Library — 50 High-Utility Prompts

How to Use This Prompt Library

Prompt quality rule: The more constraint you provide (platform, item condition, target buyer, character limits, fee targets), the better the output.

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Listing Creation

1. "Write an eBay listing for [item] with condition details [details], target buyer [persona], and mobile-first formatting."
2. "Generate 5 title variants under platform character limits with different keyword emphasis."
3. "Create bullet points that focus on buyer outcomes, not just features."
4. "Rewrite this listing with a premium tone while keeping factual accuracy."
5. "Convert this listing for Facebook Marketplace tone: concise, friendly, negotiation-ready."

Extended example (Listing Creation):

"Write an eBay listing for a used Apple MacBook Pro 14-inch M2 Pro (2023). Condition: Good — light scratches on lid, no screen defects, battery health 91%. Target buyer: professional or student who wants Apple Silicon performance at below-retail price. Use mobile-first formatting with short paragraphs. Character limit: 80 char title, 1000 char description. Include: specs, condition details, what comes in box, shipping policy."

What this produces: A complete, policy-compliant, conversion-oriented listing in under 60 seconds.

Pricing and Margin

1. "Estimate pricing bands based on these sold comps: [paste comps]."
2. "Suggest BIN price, offer floor, and auction start price with rationale."
3. "Calculate break-even after fees, shipping, and packaging for this item."
4. "Propose markdown plan for unsold inventory at day 14, day 30, day 45."
5. "Recommend bundle strategy for low-velocity SKUs."
6. "Calculate the margin impact of reducing price by 10% — how many more units would I need to sell to maintain the same gross profit?"
7. "Estimate the total landed cost if I sell to a buyer in [country] using USPS Priority Mail International."

SEO and Search Visibility

1. "Generate Etsy title plus 13 tags focused on buyer intent."
2. "Produce Amazon-style bullets with keyword diversity and clarity."
3. "Rewrite this title to improve specificity and reduce keyword stuffing."
4. "Generate backend search terms from this listing summary."
5. "Create category-specific synonyms and alternate terms buyers use."
6. "Identify the top 5 buyer personas searching for this product and what language each uses."
7. "Suggest seasonal keyword additions for [product] in Q4."

Customer Communication

1. "Draft a response to a low offer that keeps goodwill and protects margin."
2. "Draft a professional message for delayed shipping with options."
3. "Write a post-delivery follow-up asking for honest feedback."
4. "Draft a resolution-first message for damaged-item complaint."
5. "Create 10 quick-reply templates for common pre-sale questions."
6. "Write a counter-offer response to a buyer offering 30% below asking."
7. "Draft a message to a buyer who left a negative review — professional, non-defensive, resolution-focused."

Extended example (Counter-offer):

"A buyer offered $45 on my $79 listing for a vintage camera. Write a counter-offer at $68 that acknowledges their offer, explains the item's value briefly, offers free shipping as a goodwill gesture, and keeps the tone warm and conversational."

Operations and Scale

1. "Turn this product CSV into listing skeletons by platform."
2. "Build a daily listing checklist for one-person operations."
3. "Analyze these 30 unsold listings and propose action: relist, rewrite, reprice, bundle."
4. "Suggest category-specific quality controls for listing consistency."
5. "Generate a weekly performance review summary from these metrics."
6. "Build a sourcing decision matrix: which item categories have best margin-to-weight ratio for my platform mix?"
7. "Create an SOP for processing new inventory in under 30 minutes per item."

Platform-Specific Prompts

Prompt Structure That Produces Better Output

Use this template:

Platform: [platform]
Item: [details]
Audience: [buyer persona]
Constraints: [character limits, policy rules, tone requirements]
Objective: [speed, conversion, margin defense, support resolution]
Output format: [title only / bullets only / full listing / email draft]

What this does: Forces specificity that produces platform-ready output rather than generic text that needs heavy editing.

Prompt Iteration Rules

If the first output isn't right, don't start over — iterate:

1. Too long? Add: "Cut to [X] characters. Keep the most conversion-critical information."
2. Too generic? Add: "Add more specificity about [condition/feature/audience]."
3. Wrong tone? Add: "Rewrite in a [more professional / more casual / more urgent] tone."
4. Missing keywords? Add: "Include these terms naturally: [keyword1], [keyword2]."

Verification Rule

Always validate AI output against real item condition and platform rules before publishing. No prompt replaces:

• Accurate condition photos
• Verified specifications
• Platform policy compliance check
• Final human review

Related Reading

• Complete Seller AI Guide
• Seller AI Comparisons
• AI Selling in 2026 — Current State
• Marketplace Mastery by Platform

Listing Creation

1. "Write an eBay listing for [item] with condition details [details], target buyer [persona], and mobile-first formatting."
2. "Generate 5 title variants under platform character limits with different keyword emphasis."
3. "Create bullet points that focus on buyer outcomes, not just features."
4. "Rewrite this listing with a premium tone while keeping factual accuracy."
5. "Convert this listing for Facebook Marketplace tone: concise, friendly, negotiation-ready."

Pricing and Margin

1. "Estimate pricing bands based on these sold comps: [paste comps]."
2. "Suggest BIN price, offer floor, and auction start price with rationale."
3. "Calculate break-even after fees, shipping, and packaging for this item."
4. "Propose markdown plan for unsold inventory at day 14, day 30, day 45."
5. "Recommend bundle strategy for low-velocity SKUs."

SEO and Search Visibility

1. "Generate Etsy title plus 13 tags focused on buyer intent."
2. "Produce Amazon-style bullets with keyword diversity and clarity."
3. "Rewrite this title to improve specificity and reduce keyword stuffing."
4. "Generate backend search terms from this listing summary."
5. "Create category-specific synonyms and alternate terms buyers use."

Customer Communication

1. "Draft a response to a low offer that keeps goodwill and protects margin."
2. "Draft a professional message for delayed shipping with options."
3. "Write a post-delivery follow-up asking for honest feedback."
4. "Draft a resolution-first message for damaged-item complaint."
5. "Create 10 quick-reply templates for common pre-sale questions."

Operations and Scale

1. "Turn this product CSV into listing skeletons by platform."
2. "Build a daily listing checklist for one-person operations."
3. "Analyze these 30 unsold listings and propose action: relist, rewrite, reprice, bundle."
4. "Suggest category-specific quality controls for listing consistency."
5. "Generate a weekly performance review summary from these metrics."

Prompt Structure That Produces Better Output

Use this template:

"Platform: [platform]. Item: [details]. Audience: [buyer persona]. Constraints: [character limits, policy rules]. Objective: [speed, conversion, margin]. Output format: [title, bullets, description, CTA]."

Verification Rule

Always validate AI output against real item condition and platform rules before publishing.