Disk Prices / Digital Film Stock (unli.xyz)

"Two niche eBay price comparison tools — one for disk drives and one for digital film stock — powered by 200+ regex expressions that parse eBay item titles and descriptions to help buyers find the best deals."
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unli.xyz/diskprices
Maker: xk3
$400-$600/mo (explicitly stated by creator, combined across both projects)

Marketing Channels

Primary

SEO / organic search

Niche comparison tools targeting specific search queries like 'disk prices eBay' and 'digital film stock' likely drive organic traffic

Secondary

Hacker News

Shared in the HN yearly projects thread to showcase the projects

Ongoing

eBay ecosystem

Tools are built around eBay data, making them discoverable by eBay buyers searching for price comparisons

Growth Levers

  • Expand to additional eBay product verticals using the same regex-based parsing framework
  • Fix localization issues (e.g., use 'United Kingdom' instead of 'UK' as flagged by community)
  • Add price history and alerts to increase user retention and repeat visits
  • Optimize for international markets to capture eBay users outside the US
  • Create SEO content (buying guides, price trend analyses) to drive more organic traffic

First Customer Strategy

Built niche price comparison tools that aggregate and parse eBay listings using extensive regex. Users likely discover the tools through search when looking for specific product price comparisons. No explicit customer acquisition strategy mentioned — appears to be organic discovery.

Pricing Insight

No direct pricing mentioned. Revenue likely comes from eBay affiliate commissions and/or display advertising on the comparison pages. The $400-$600/mo range suggests a lean affiliate or ad-based model.

New Market Opportunities

  • International eBay markets Feedback about using 'United Kingdom' instead of 'UK' indicates demand from international users and an opportunity to better serve non-US markets
  • Additional product verticals The regex-based parsing engine is reusable and could be applied to other eBay product categories beyond disks and film stock

Key Takeaways

  • • Niche comparison tools built on top of marketplace data can generate steady passive income
  • • Heavy regex-based parsing (200+ expressions) enables structured data extraction from unstructured eBay listings
  • • The same technical approach can be replicated across multiple product verticals to diversify revenue
  • • Localization details matter — correct terminology helps with both SEO and user trust in international markets
  • • Simple tools that solve a specific buyer pain point (finding best prices) can sustain $400-$600/mo without complex infrastructure

Sentiment Analysis

1 Neu

Notable Quotes

"FYI United Kingdom is the right term and the one UK users are more likely to look for! — rjh29"

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