An afterthought if I may; There's been a number of good responses to the question here. I wish this site had been around when I was learning.(teaching myself) Of course, in my day, a computer usually took up a couple of rooms and had a pretty healthy power bill. I know, 'cause I worked on 'em.
Oh! the afterthought, I almost forgot. What came to mind last night was that on eBay there are a number of sellers that don't know what they are selling. I saw a "Globemaster" vernier caliper selling for almost as much as a Mitutoyo. In the 70's, Globemaster tools were in a bin by the check out counter for $0.99. That in the days before plastic tools. And the shaper gauge that was called an "angle block". For $20 bux. A shaper gauge is usually $40 or better.
The name brands listed here are mostly of the good stuff variety. But I have a problem with any battery operated tool. Batteries always seem to quit at the most inconvenient times. Say, at 11:00 PM when a trip to the store is out of the question. Just because I'm paranoid doesn't mean they're not out to get me. Absence of evidence in not evidence of absence.
Personally, I tend more toward Brown & Sharpes, with Mitutoyo running a close second. Starrett is good stuff, no question. But resellers charge as much for the name as for the tool. And then others sell the tool and want as much for their low end tool as for a Starrett. And, lastly, I am concerned that with eBay fees so high, those fees are often calculated into the pricing. And if you're buying new, be aware that Starrett has moved much of their production overseas.
All in all, take pricing with a grain of salt. Nay, a pound... ... Yes, I base my purchases on price. But I still appreciate good tools as worth the cost. I wouldn't ever buy a Globemaster, even if it was less than a dollar today. But by the same token, if what I want is only available in Starrett or B&S, I'd look long and hard at it, and the price, before committing to it.
Well, I've had my say (rant) and apologize for the amount of time it's taken up.
Bill Hudson