Yahoo! Auctions Japan Underpriced Deals — Live vs Sold
Pricing
from $20.00 / 1,000 keyword scanned for deals
Yahoo! Auctions Japan Underpriced Deals — Live vs Sold
Which Yahoo! Auctions listings are cheap right now? Builds the sold-comp median for your keyword from closed auctions, then scores every live listing against it and returns the ones below your threshold, with the discount distribution and the comp basis. For resellers and proxy buyers. From $0.02.
Pricing
from $20.00 / 1,000 keyword scanned for deals
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h ichi
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Yahoo! Auctions Japan Underpriced Deals — Live vs Sold Comps
Plenty of Actors will tell you what a thing sold for. The question that makes money is what is mispriced right now, and answering it needs both books in the same call: the closed-auction median and the live listings, scored against each other.
How the score is built
- Sample closed auctions for the keyword — only ones that received a bid, because an ended auction with no bids is an asking price nobody accepted → the basis.
- Sample the live listings.
discountPct = (1 - price / soldMedian) x 100.- Return everything at or below your threshold, plus the distribution.
Two guards, because a basis can lie in two ways
Too few comps. minComps (default 8) refuses a keyword whose median rests on a handful of sales.
Too many kinds of thing. A camera search also returns its batteries, cases and manuals. maxCompSpread (default 4.0) checks the p75/p25 ratio of the comps and refuses a keyword that mixes price tiers, pointing at the fix:
The price band is pushed to Yahoo on both sides, so the basis and the candidates cover the same tier.
In both cases the run returns basisUsable: false with the reason and is not charged. mixedKeywordLikely flags the remaining tell: in a coherent market only a small share of the live book sits far under the median, so a high dealRatePct means the keyword is still mixed.
Parse health is part of the output
The live search page is server-rendered HTML, not JSON, and it has sharp edges — cards that cannot be closed on </li>, a listing promoted twice per page, a total count that lives in the tab rather than the <meta> description (which says approximately). malformedCards and duplicateCardsDropped ship with every summary, so a page redesign shows up as a number rather than as a quietly smaller sample.
Pricing
From $0.02 per keyword, $0.002 per individual deal. An unusable basis is never charged.
Read-only public pages, no login, throttled requests. Seller identities are never emitted. Nothing is stored between runs.
