Nice, congrats!
Yeah, I think depending on what bubble you're in, bootstrapping to 400k and 2x'ing every few years is either failure or amazing. The VC/hypergrowth path doesn't appeal to me, so I think something that gives you $100k+/yr in profit is a huge success.
> I'd love to learn more about your process of the sale.
Sure, I wrote a couple of posts with the details.[0, 1]