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Cryptographic Engineering

by Çetin Kaya Koç (Ed.)

Rated4.0(1 rating)In stock

Normal price

$120.70 is within 5% of the $120.54 it normally sells for.

Now
$120.70
Normally
$120.54
Lowest in 142 days
$120.54(Oct 9)
Highest
$159.67
Evidence: Strong142 days tracked6 price changes

Where today's price sits

View on amazon.com (opens in a new tab)

Prices change. Confirm the price on Amazon before you buy. TrackPin may earn a commission if you buy, at no cost to you; it never changes a verdict.

Get an email when the price drops

Good: 5%+ below normal. Great: 20%+ below. One email when it happens. No account, no newsletter.

The listing's crossed-out price

Not below normal

The listing shows

crossed out: List $269.00 −55%

Against its normal price

≈ 0% vs $120.54

This product has sold at or within 3% of $120.54 for at least about a week of the last 45 days, so today's price isn't below its normal price.

The crossed-out price is the reference shown on the listing. We don't know how it was set; we only compare it with prices we've observed. How we check →

Price history

Tracked since Jun 22 · 142 days · 6 price changes

Loading the price chart.

  • Price
  • Normal $120.54
  • 5% or more below normal

More real deals in eBooks

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Get this as JSONThe same verdict and prices, from the TrackPin API.
GET/api/v1/product/B00BWWCT72
Request
curl https://trackpin.co/api/v1/product/B00BWWCT72 \
  -H "x-api-key: $TRACKPIN_API_KEY"

This is exactly what the API returns for this product. Free keys include 100 requests a day.

Request a key
Live response, As of 18:58 UTC
{
  "asin": "B00BWWCT72",
  "title": "Cryptographic Engineering",
  "image": "https://m.media-amazon.com/images/I/51bzvW-pAKL._AC_SL500_.jpg",
  "currency": "USD",
  "category": "eBooks",
  "category_label": "eBooks",
  "in_stock": true,
  "price": {
    "current_cents": 12070,
    "reference_cents": 12054,
    "discount_pct": -0.13,
    "is_deal": false,
    "observed_at": 1794417276883,
    "changed_at": 1794076430128,
    "checked_at": 1794417276883,
    "source": "stored"
  },
  "verdict": {
    "label": "normal",
    "text": "Normal price",
    "pct_vs_normal": -0.13,
    "evidence": "strong",
    "stale": false,
    "suspect": false,
    "steady_since": null,
    "sentence": "Normal price. $120.70 is within 5% of the $120.54 it normally sells for."
  },
  "listing_claim": {
    "label": "List:",
    "listing_reference_cents": 26900,
    "claimed_pct": 55,
    "real_pct": -0.13,
    "class": "not_below_normal",
    "observed_at": 1794076440723
  },
  "stats": {
    "min_cents": 12054,
    "max_cents": 15967,
    "avg_cents": 14388,
    "history_days": 142,
    "price_levels": 199,
    "price_changes": 6,
    "distinct_prices": 3,
    "lowest_at": 1791572238864
  },
  "history": [
    {
      "price_cents": 15967,
      "from": 1789348245532,
      "to": 1791314389026
    },
    {
      "price_cents": 13999,
      "from": 1791441212823,
      "to": 1791441212823
    },
    {
      "price_cents": 12054,
      "from": 1791572238864,
      "to": 1791900217441
    },
    {
      "price_cents": 13999,
      "from": 1791909103374,
      "to": 1794068340953
    },
    {
      "price_cents": 12070,
      "from": 1794076430128,
      "to": 1794417276883
    }
  ],
  "last_seen": 1794417276883
}
// … 194 more steps in the full response

Normal price: the lowest price level the product held for at least 15% of the last 45 days (about a week). Prices within 3% of each other count as one level, and we use the lowest price in that level. How we calculate it → Prices are observations of amazon.com and may be incomplete or delayed. TrackPin is not affiliated with Amazon.