I got mine at work from MSC industrial supply or something like that. I think they cost around $25. For what I use them for they work great. I've had them for almost a year, and I would put money down that they are still 100% dead on. But... Like I said, for what I use them for, I don't need that extra peace of mind of spending an extra $100 for a good name brand. I probably only use them a couple times a week just for basic measurements. If they're going to be used alot everyday for years and years, then I wouldn't skimp on them.
I'm not an expert on what brands are good for what, but I can say that out in the shop at work, alot of what I see is Mitutoyo. And another thing, Craftsman makes good hand tools and stuff because that's what they specialize in. I don't doubt that the calipers they make (or buy and slap thier name on) are good quality, but when you need hand tools buy Craftsman, when you need measuring equipment, buy from someone who speciaizes in it.
If you want I can check, when I get in to work tomorrow, for the catalog that I bought mine from. I know they have an online catalog too. They have lots of stuff in the under $100 range, and lots of stuff if you want to spend more. But if you go through a supply warehouse you're probably going to get a better deal than if you go through a retailer.
**Edit** here's a link for MSC ----->
http://www.mscdirect.com/