Businesses sell for 0x and Infinityx all the time. There are countless examples of that.

But bootstrapped business with growth rate for 7x+ (non-trivial) revenue are uncommon.

4x may be "ouch" for a VC but not a bootstrapper.

The last startup I was at that sold 'only' made the owners millionaires, when they were hoping to retire.

If you're in your thirties or forties, a million bucks won't even get you a school teacher's lifestyle for the rest of your life. A million bucks makes the rest of your work life low-stress, but not non-existent. You still have to work, you just don't have to worry about paying rent, or getting exploited by your boss. You can always quit, and you can always say no (one of the reasons some bosses like a hint of desperation on their employees)

They bought water view condos, one got his teeth fixed, and then they had to go right back to work.

Interesting story.

Forgive me but I'm not sure I see the relationship to my comment.

A million after taxes is worth 20 years at 100k after taxes (50% rate).

Investing a million today say in real estate over 20 years will give you money to live on while you rent and a the property can be sold for double in 20 years. Repeat and this strategy would bring increasing wealth for a 20 year old.

No one makes $100k and pays $50k in taxes.

Give the examples. Businesses this size in this market have very few (/0) logical buyers.

I can't speak for valuations, but I don't see the 'no logical buyers' argument. This product has multiple competitor products, mostly at far higher price points, any of those manufacturers would seem like a logical buyer to me (if only to get rid of the competition). Can you elaborate?

You aren't just buying a company, you're buying a job. In this blog post, the payroll expense is $250k a year. The founder is working for free 40 hours a week, acting as a software dev, managing a $40k advertising budget, developing the product, and overseeing the customer support team.

If you buy this company and hire somebody who can do all those things, that $235k of net profit becomes $0.

Buying it just to shut it down without continuing the product- eh- does your product really address all the needs of the customer base? Or will they go to another competitor instead?

It's small. There are very few logical buyers of technically complex small businesses. There are logical buyers of small businesses and logical buyers of technically complex businesses, but at the intersection there is not.

Even bog standard SAAS companies struggle to sell at a decent multiple when they are really small, and they aren't especially complex.

I think this is one of those areas where a competitor buying you can make sense. Either your product is attractive to higher margin customers, at which point they are buying into a higher end market, or your product is part of the low-end, and by buying you out and shutting you down, they hope to convert some of your lower margin customers to higher margin customers, and let some of your high-maintenance customers go bother one of your mutual competitors (which is honestly the most Sun Tzu-ish, borderline Machiavellian, reason to fire a customer)

Not in the small cap SaaS world.

2-4X is the current range.

The exceptions are for companies with extreme growth rates for multiples years in a row. These are extremely rare, even more so with pure bootstrapping.