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A simpler signal: Did I buy the $250 Roomba 105 or the $900 Roomba Max 705?

I'm not sure about that. The wealthiest people I know are also the most careful about where they spend their money.

Maybe so, but the poorest people I know don't buy the most expensive tech toys.

I mean, their teenage kids certainly lobby for them, at least as far as iPhones go...