Describe what you want
Plain language in, parsed intent out: category, price ceiling, condition floor, brand constraints. The parse is shown, so you can correct it.
Know the real cost before you buy — and the real margin before you resell.
MarginMap normalizes messy listings into canonical products, computes landed cost, and scores each offer against completed-sale comps. Buyer mode optimizes the purchase. Reseller mode optimizes the exit.
- Landed cost
- Sold comps
- Auditable
- None
item + shipping + tax, per offer
recency-weighted median, IQR trimmed
source, timestamp, match confidence
missing data is labelled missing
How it works
See landed cost against sold comps
Offers resolve to one canonical variant, total to item plus shipping plus tax, and rank against a recency-weighted median of completed sales.
Decide, then track
Buyers get a value score with its factor breakdown. Resellers get net proceeds, ROI, breakeven and a seven-stage pipeline.
Optimize the purchase
- Landed cost ranking instead of sticker-price ranking.
- Value score against completed sales, with the factor weights exposed.
- Seller trust, fulfillment speed and return terms as explicit lines.
- Condition normalized onto one ladder across every source.
Optimize the exit
- Net proceeds after commission, processing, shipping and promotion.
- ROI on total capital deployed, annualized by observed days-to-sell.
- Breakeven purchase price as a negotiating position.
- Seven-stage pipeline from watch to sold, with realized-vs-estimate feedback.
The eight things it gets right
Each of these is a design decision with a price consequence. Read the reasoning before you trust the output.
Canonical product identity
How MarginMap collapses messy marketplace titles into one canonical variant so price comparisons describe the same physical thing.
Landed cost
Item price plus shipping plus tax, computed per offer. How MarginMap handles unknown tax, free-shipping thresholds and cross-border charges without guessing.
Sold comps vs asking price
Fair market value from completed sales using a recency-weighted median with outlier filtering — never from active listings.
Evidence & confidence
Every score, median and recommendation in MarginMap links to its source records, retrieval timestamps and match confidence.
Margin & ROI
Expected profit, ROI, breakeven and liquidity computed from landed cost, sold comps, marketplace fees and holding time.
Marketplace fees
Category commissions, payment processing, promoted listings and shipping subsidies modelled per marketplace and per category.
Condition grading
Mapping inconsistent seller condition language onto a single grade ladder so comps and offers describe comparable goods.
Sourcing workflow
The seven-stage pipeline from watchlist to sold, with alerts, saved evaluations and post-sale accuracy feedback.
Plans
Flat per-seat pricing. We never take a percentage of your margin — that would reward optimistic numbers.
$0
forever
5 searches a day, 3 watchlists, landed cost and completed-sale comparables.
See what is included$9.99
per seat / month
Unlimited searches, reseller mode, deal calculator, alerts and CSV export.
See what is included$49.99
per seat / month
Up to 5 seats with roles, unlimited alerts, API access and 90-day history.
See what is includedCustom
contact sales
Unlimited seats and API, custom integrations, SSO and an uptime SLA.
See what is includedFrom the blog
All articleseBay fee calculator: what sellers actually pay in 2026
eBay's fee schedule is three separate charges stacked on the same sale. Most sellers quote the headline percentage and lose the rest to rounding. Here is the full stack.
Sold comps vs asking price: how to read the market
An item 'listed for $400' tells you what one hopeful seller wants. The same item's last thirty completed sales tell you what buyers actually paid. Only one of those numbers should drive your buy decision.
eBay vs Amazon selling fees compared
Both platforms take roughly an eighth to a sixth of your sale, but they take it in completely different places. The cheaper platform depends on your category, price point, and who ships the box.
Questions people ask first
Run one product through it
Open the workspace, search in plain language, and open the evidence drawer on the first number you doubt.