Open to offers

Marketplace

Live SaaS products, content sites, sister-site bundles, asset-only builds, and held domains. Open to offers on all listings — scope (domain, code, deployment) is listed per asset.

Active products

Live, operating products. Currently owner-run, open to offers from the right operator.

BillNode

billnode.app
Live

Financial calculators for ecommerce and freelance operators. Net margin, break-even ROAS, fee analysis — all client-side, no data sent.

  • 6 calculators across ecom/DTC and freelance/agency tracks
  • True net margin + break-even ROAS output
  • No account, no server — pure static HTML
  • Self-hosted on OVH
Tools Finance Commerce
Details Visit →

DueRelay

duerelay.com
Live

Webhook relay and delivery infrastructure. Ingest, deduplicate, and route events with verified receipts.

  • Idempotent ingestion + deduplication
  • Delivery retries with attempt tracking
  • Agent Control Plane in development
  • Live in production, self-hosted on OVH
Infrastructure SaaS Go
Visit →

The New Tradesman

thenewtradesman.com
Live

A publication on recurring failures in software businesses. Patterns, not blame. Judgment and restraint.

  • Pattern-driven editorial format
  • Anonymised case studies across billing, support, trust
  • Ghost CMS, self-hosted on OVH
  • Each post follows a strict pattern schema
Editorial Content Ghost
Visit →

PlainStatement

plainstatement.com
Live

Free invoice generator with Pro tier. No account required. Clean UX, fast PDF generation.

  • Deployed and operational, pre-distribution
  • Free tier + Pro subscription model
  • PDF generation, international-friendly fields
  • Express.js backend, self-contained deployment
SaaS Billing Node.js
Details Visit →

Sister sites — pair preferred

Two sites built as a reciprocal pair. Sold together by default. Split offers entertained at a premium.

Selling Currently

sellingcurrently.com
Live

AI-driven niche content site across commerce verticals. 50+ published articles, SEO-structured.

  • WordPress with REST API automation pipeline
  • 50+ published articles, actively growing
  • Commerce and affiliate-oriented content
  • Programmatic publishing via this server
Content Commerce WordPress

Currently Selling

currentlyselling.com
In development

Multi-category product discovery site. Built for brand affiliate partnerships and deal-tier navigation.

Includes: Domain + partial static codebase

  • Category-driven frontend with clean, extensible structure
  • Built for direct brand affiliate partnerships
  • Affiliate infrastructure built; deals seeded as drafts pending real partnerships
  • Sister site to Selling Currently — pair preferred
Commerce Affiliate

Why these two are stronger together — pair thesis, bundle pricing, and how the sale works.

View pair listing →

Asset only

Built to sell, not to operate. No live users, no revenue — domains and codebases ready for an operator to take to market.

ForexFin

forexfin.tech
Available

Webhook-based market alert routing demo. TradingView-compatible event flow with public receipt verification.

Includes: Domain + codebase

  • Alert source → router → destination → receipt
  • TradingView + curl compatible payloads
  • Public receipt endpoint for verification
  • Proof of flow — no active users, idea stage
Fintech Webhooks
Details

DueBeacon

duebeacon.com
Available

Domain built for reminders, invoice follow-ups, and receivables tracking. Strong metaphor, B2B-ready.

Includes: Domain only

  • Clear meaning on first read — no explanation needed
  • Professional, B2B-friendly naming
  • Natural fit for billing SaaS, fintech, AR tools
  • Was planned as a notification layer on DueRelay
Domain Fintech SaaS
Details

Held domains

Parked. Open to reasonable offers.

  • ixvor.com Short, invented. No category constraint. Five characters, premium feel.
  • nhiom.com Compact, unique. Flexible positioning. Five characters.
  • vhaelum.com Same semantic universe as Vhaeon. Knowledge graph, research, or AI niche.

Make an offer

Acquisition, domain transfer, or partnership. Keep it short — what you want and what context you're bringing.

office@constantin-works.com

Opens your email client. No server-side processing.