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Cherrybook.
Sump Coffee

Melting Darkness // Dark Roast

Dark Roast

Dark

Cherrybook Index

63sparse

Evidence-of-quality score, not a cup score. Sparse signal: 1 of 7 signals on file. Methodology

Price position

$1.39/oz$20.00 for 408g

Typical band for this profile $1.06 to $2.08 (process unlisted blend lots (variety unlisted, retail bags); USD listings; dark roast in stock). Where it sits

Catalog summary

A lot from Colombia, not yet indexed (1 of 7 signals on file) and priced inside the typical band for its listed profile.

Based on the listing and catalog evidence

Buy on Sump Coffee

Price and availability set by the roaster.

Cherrybook last checked this listing today.

Melting Darkness // Dark Roast by Sump Coffee
Origin
Colombia
Producer
Farm / Co-op
Process
Altitude
Varietals
Harvest
Weight
408g
Bag price
$20.00
Price / oz
$1.39/oz
Brew

from the roaster’s storeread by Cherrybook from the listing“estimated” below = inferred, not stated

Price contextmodeled

A modeled range and current prices for comparable listings.

$1.39/oz

typically $1.06 to $2.08

Where it sits

210 process unlisted blend lots (variety unlisted, retail bags); USD listings; dark roast in stock

typical band this lot

24th percentile of 210 process unlisted blend lots (variety unlisted, retail bags); USD listings; dark roast in stock right now.

What moves this price

cheaper×1.00pricier
  • Roaster brand and sourcing×0.85
  • Colombia origin×1.05
  • Process not listed×0.97
  • Variety not listed×0.97

At 408 g, this bag runs about 3% less per ounce than a typical 306 g bag; that is pack size, not the coffee.

How this estimate works

A statistical model, refit weekly across the in-stock catalog, estimates what a coffee with these listed attributes typically sells for per ounce. Each multiplier compares one trait against the average lot in this market; the roaster line covers brand and sourcing together, which this model cannot separate. Bag size is shown separately, priced at the rate observed across sizes of the same coffee, because it says nothing about the coffee itself. The distribution counts every in-stock listing in the comparison group, with at least 15 listings from three roasters and no roaster supplying more than 60% of it. Decaf, blends, variety segments, processing families and bag formats stay separate. Origin, roast and selling currency can broaden as the group label indicates. Prices are converted to USD per ounce; shipping and differences in tax treatment are not adjusted. The model reads listed attributes only: the quality of the specific lot in the bag is not observable, so a price above the typical band is not evidence of overpricing.

Some listing details are missing or have limited model coverage, so the typical band shown is wider than usual.

Not listed by the roaster: process, variety, altitude

Cherrybook Index (CBI)

Evidence-of-quality score, not a cup score. Methodology

63

Sparse signal

Confidence1 of 7 signals on file

Score is heavily shrunk toward 50; treat as a placeholder until more sources arrive.

How confidence affects the score

Coverage measures signal availability, not cup quality. This coffee has 18% of the signal universe on file. Missing sources are dropped, remaining weights are renormalized, and the result is shrunk toward a neutral 50 baseline by 55% so one thin signal cannot carry the score on its own.

The math on file: renormalized base 90.0 shrunk to 68.0 + bonuses = 63.

Missing: SCA grade, Coffee Review, YouTube reviews, On-shop ratings, Cherrybook ratings, Roaster transparency

  • Reddit sentiment
    Sentiment across specialty-coffee discussion
    90/ 100% weight

Bonuses applied

  • Stale-stock demotion
    This lot has been listed in stock for an extended time; specialty coffee freshness degrades over weeks
    +-5

Comps & alternatives

Tasting flight

Compare this with three more lots selected from the catalog.

Brew a set side-by-side. The picks vary along axes that pair with this lot; origin, process, roast, or producer; so you learn the difference, not just drink four good cups.

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Reference · About the varietal & origin

About Sump Coffee

Community reputation · Reddit

Cult favorite· sentiment 90/100

Two Reddit posts praise Sump. One poster says they enjoyed trying it; another calls a Costa Rica coffee exceptional, juicy, full, easy to brew, and highly recommends it.

Costa Rica coffeeSt. Louis roaster
Threads cited (2)

On YouTube

8 videos · 284k combined views

Sump Coffee has 6 videos on their channel; 2 videos come from outside reviewers (Hypegirl Creative, STL Curator).

Sump Coffee

$1.39/oz· $20.00 a bag

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