I remember the moment when in my last startup, the first invoice was paid - $5. A magic moment. I still remember the name of the customer. The last invoice before exit was $50.000. I remember that customer too.
Interesting, did you pivot / change the target market? $5 sounds more like a consumer product but $50k likely isn't (unless you literally progressed from skateboards to cars like every Agile cartoon wants to make us believe)...
Among other things, I'm working on an elephant hunter type product. Took us five months, but the first invoices were $7k, $3k and now $45k but that doesn't prove much yet.
