Sea to Summit Spark Pro Ultralight Down Sleeping Bag

Only 17 left

Great price

$519.20 is 20% below the $649.00 it normally sells for.

Now: $519.20
Normally: $649.00
Lowest in 144 days: $486.75(Sep 6)
Highest: $649.00

Evidence: Strong144 days tracked3 price changeschecked 59 min ago

Where today's price sits

Now $519.20Normal $649.00List $649.00$486.75

View on amazon.com

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.

Amazon price jumps and real deals, posted on X: @trackpindeals (opens in a new tab)

The listing's crossed-out price

Holds up

The listing shows

crossed out: ~~List $649.00 −20%~~

Against its normal price

−20% vs $649.00

List $649.00 (−20%) holds up: today's price is 20% below normal.

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 →

Listing checked 6h ago

Price history

Tracked since Jun 22 · 144 days · 3 price changes

Ahead of Black Friday 2026 (Nov 27), it is already 20% below its normal price of $649.00. Sea to Summit Spark Pro Ultralight Down Sleeping Bag price history, checked Nov 14, 2026: current price $519.20, normal (typical) price $649.00, average $645.64 over 144 days, lowest $486.75 (Sep 6, 2026), highest $649.00 (Oct 18, 2026).

Price
Not checked for 3+ days
Normal $649.00
5% or more below normal

How often does it drop below normal?

In the 144 days we've tracked it, it stayed 5% or more below today's normal price for an hour or more twice, typically lasting about 1 day. It's below normal right now.

A count of what happened, not a prediction.

More real deals in Sports

See all

Get this as JSONThe same verdict and prices, from the TrackPin API.

GET/api/v1/product/B0GDNZY1X4

Request

curl https://trackpin.co/api/v1/product/B0GDNZY1X4 \
  -H "x-api-key: $TRACKPIN_API_KEY"

const res = await fetch("https://trackpin.co/api/v1/product/B0GDNZY1X4", {
  headers: { "x-api-key": process.env.TRACKPIN_API_KEY },
});
const product = await res.json();

console.log(product.verdict.label, product.price.reference_cents);

import os, requests

r = requests.get(
    "https://trackpin.co/api/v1/product/B0GDNZY1X4",
    headers={"x-api-key": os.environ["TRACKPIN_API_KEY"]},
)
product = r.json()

print(product["verdict"]["label"], product["price"]["reference_cents"])

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

Request a key

Live responseAs of 01:35 UTC

{
  "asin": "B0GDNZY1X4",
  "title": "Sea to Summit Spark Pro Ultralight Down Sleeping Bag",
  "image": "https://m.media-amazon.com/images/I/61qw1mWgX7L._AC_SL500_.jpg",
  "currency": "USD",
  "category": "Sports",
  "category_label": "Sports",
  "in_stock": true,
  "price": {
    "current_cents": 51920,
    "reference_cents": 64900,
    "discount_pct": 20,
    "is_deal": true,
    "observed_at": 1794616573309,
    "changed_at": 1794557291455,
    "checked_at": 1794616573309,
    "source": "stored"
  },
  "verdict": {
    "label": "great",
    "text": "Great price",
    "pct_vs_normal": 20,
    "evidence": "strong",
    "stale": false,
    "suspect": false,
    "steady_since": null,
    "sentence": "Great price. $519.20 is 20% below the $649.00 it normally sells for."
  },
  "listing_claim": {
    "label": "List:",
    "listing_reference_cents": 64900,
    "claimed_pct": 20,
    "real_pct": 20,
    "class": "holds_up",
    "observed_at": 1794597394964
  },
  "stats": {
    "min_cents": 48675,
    "max_cents": 64900,
    "avg_cents": 64564,
    "history_days": 144,
    "price_levels": 187,
    "price_changes": 3,
    "distinct_prices": 3,
    "lowest_at": 1788734546133
  },
  "history": [
    {
      "price_cents": 48675,
      "from": 1788734546133,
      "to": 1788734546133
    },
    {
      "price_cents": 64900,
      "from": 1789650747993,
      "to": 1791337971947
    },
    {
      "price_cents": 64900,
      "from": 1791694842450,
      "to": 1792143890894
    },
    {
      "price_cents": 64900,
      "from": 1792350742974,
      "to": 1794537520352
    },
    {
      "price_cents": 51920,
      "from": 1794557291455,
      "to": 1794616573309
    }
  ],
  "last_seen": 1794616573309
}
// … 182 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.

Sea to Summit Spark Pro Ultralight Down Sleeping Bag

The listing's crossed-out price

Price history

How often does it drop below normal?

More real deals in Sports

Sveltus Epoxy Dumbbell 1 kg X2

WILSON WILSONTennis Racket

BBB Chain lock Bike lock PowerChain BBL-14 black

KingCamp Gorgeous Double 6.7" Camping Mattress with Washable Foam Cover, Extra-Thick Full Size Inflable Mattress with Pump Sack, Portable Double Mattress for Camp Outdoor Tent, Car & Guest

OGIO Golf Fuse 4 Stand Bag (Rocket Pop)

Holbrook Aero Edgeless Pickleball Paddle, Foam Core Carbon Fiber, 14/16mm | Elongated, hybrid or square shape, T700 or metallic carbon face, foam core, USAPA approved, 14mm or 16mm, 7 styles