A

C2C Seller Revenue Dashboard

4.25

Derivation Chain

Step 1 Karrot Pay and trust system expansion
→
Step 2 Growth of professional C2C Platform sellers
→
Step 3 Revenue/inventory management tool for professional sellers
→
Step 4 Multi-Platform unified settlement Infrastructure

Problem

Professional secondhand sellers (50+ transactions/month) operating across 2-3 platforms like Karrot, Bunjang, and Jungonara spend 3-4 hours per week manually organizing transaction records in Excel. Different fee structures across platforms make it difficult to track actual net profit, and gathering transaction evidence for Tax filing wastes an additional 10-15 hours annually.

Solution

The tool auto-collects sales records from each C2C Platform (via notification message parsing + app integration) and displays them in a unified dashboard, automatically calculating net profit after deducting platform-specific fees and shipping costs. It generates monthly and category-based profit Reports and provides one-click export of Tax filing documentation for simplified/standard taxation.

Target: Ages 20-40, professional sellers with 50+ monthly secondhand transactions, operating as simplified Tax filers or side-business individuals
Revenue Model: SaaS Monthly Subscription $7.50 (~9,900 KRW)/account (up to 200 transactions/month); Pro Plan for 500+ transactions $15 (~19,900 KRW)/month; Tax filing Report $3.75 (~5,000 KRW) Per Transaction additional
Ecosystem Role: Supplier
MVP Estimate: 2_weeks

NUMR-V Scores

N Novelty
3.0/5
U Urgency
5.0/5
M Market
4.0/5
R Realizability
4.0/5
V Validation
5.0/5
NUMR-V Scoring System
N Novelty1-5How uncommon the service is in market context.
U Urgency1-5How urgently users need this problem solved now.
M Market1-5Market size and growth potential from proxy indicators.
R Realizability1-5Buildability for a small team with realistic constraints.
V Validation1-5Validation signal quality from competition and demand data.
Each dimension is scored 1-5 and weighted into grade S/A/B/C/D.
SaaS N=.15 U=.20 M=.15 R=.30 V=.20 Senior N=.25 U=.25 M=.05 R=.30 V=.15

Feasibility (72%)

Tech Complexity
29.3/40
Data Availability
23.1/25
MVP Timeline
20.0/20
API Bonus
0.0/15
Feasibility Breakdown
Tech Complexity/ 40Difficulty of core implementation stack.
Data Availability/ 25Practical availability and cost of required data.
MVP Timeline/ 20Expected time to ship a usable MVP.
API Bonus/ 15Bonus for viable public API leverage.
Total 100 points; below 50% is filtered out.

Market Validation (69/100)

Competition
10.0/20
Market Demand
19.4/20
Timing
14.0/20
Revenue Signals
10.5/15
Pick-Axe Fit
10.5/15
Solo Buildability
5.0/10
Validation Breakdown
Competition/ 20Signal quality from competitor landscape.
Market Demand/ 20Demand proxies from search and mention patterns.
Timing/ 20Fit with current shifts in tech, behavior, and regulation.
Revenue Signals/ 15Reference evidence for monetization viability.
Pick-Axe Fit/ 15How well the concept serves participants in a trend.
Solo Buildability/ 10Practicality for lean-team implementation.
Total 100 points; below 50 is filtered out.

Technical Requirements

Backend [medium] Frontend [medium] Data Pipeline [low]
Dashboard