GitHub Repository

Open-source Windows app that scores Facebook Marketplace listings against real eBay sold-comp data. Deterministic, percentile-rank scoring with confidence intervals — free forever for 3 saved searches, Pro for unlimited and instant alerts.

4 starsPython

Bullseye – $40/mo for a Marketplace deal-finder? I built a free one

Name: Bullseye – $40/mo for a Marketplace deal-finder? I built a free one
Availability: InStock
Author: reubenlavin

by reubenlavin·May 12, 2026·1 point·0 comments

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AI Analysis

●●●BangerSolve My ProblemBig Brain

Deterministic deal scoring using Tukey-trimmed eBay comps beats vague 'market value' estimates.

Strengths

•Four-layer adaptive scanner with exponential cooldowns avoids Facebook rate limits.
•Tukey-fenced outlier removal ensures median prices aren't skewed by anomaly sales.
•No Facebook login required; reads public listings without risking account bans.

Weaknesses

•Windows-only executable limits the audience; no macOS or Linux support yet.
•Reliant on eBay API stability and Facebook's public HTML structure remaining unchanged.