Hft
I'm actually a big fan of Harbor Freight...Yes, most of their tools are not super-high-quality...However, for a hobbyist they are often more than adequate,as long as you don't abuse them. Years ago, when I worked on cars(professionally) and had thousands of dollars worth of tools, I had lots of Snap-on and Craftsman, high-end welding equipment, too. But I also had quite a few various tools that I had picked up from Harbor Freight, mostly things I didn't use often, so I didn't want to invest alot into. But eventually, I used and abused some of these HF tools and they actually held up well, I only remember wearing out or breaking a very small numberof things (and I was usually "beating" on them when I did. No problem, just get another, for cheap.
Anyway, I've had one of these sets of calipers for several years now, and they've always worked quite well, and maintain accuracy (I don't think I've ever had to re-zero)...