[For Sale] GetPaid — deployed B2B invoice-tracking SaaS for service businesses (Flutter/Firebase, $2,500)

Selling GetPaid, a deployed B2B micro-SaaS that helps small service businesses (HVAC, plumbing, contractors) track overdue customer invoices and send professional payment reminders.

Stack: Flutter Web + Firebase (Auth, Firestore, Cloud Functions) + Hotmart billing (3 tiers already configured) + SendGrid email, on a custom domain (getpay.win).

What's real and working: overdue-invoice prioritization engine, CSV import, 5 reminder email templates, Mark as Paid, email history, Google + email auth, and 87 automated tests (47 Dart + 40 Node) covering the core logic.

Being upfront: revenue is $0, 0 paying customers - this is a pre-revenue asset sale. The Hotmart product is built but still in draft status, needs final submission before it can bill real customers. No mobile app.

Includes full source code, Firestore schema, documentation, deployment config, and the domain. Happy to walk through the code or answer questions.

Live: https://getpay.win

Asking $2,500, open to offers.