I don't use my height gage that much, so I prefer a vernier scale on it, never gums up, no batteries to die, no electronics to die. I bought a nice, old, slightly used Starrett 12" height gage off eBay in the original box, with accessories, in like new condition for 30 some dollars, delivered. I will take it over an import dial or electronic height gage anytime.
I bought the B&S inch/metric one mentioned above. I was able to unscrew the scales and calibrate them. It was $90 shipped. Now I need to get a surface plate. I will also look for a 6" dial height gage, this one is really big.
Incidentally, what do people use to lube these? 3-1 oil? They make gage lube, too. I thought I would lightly lube the sliding scales and the screws.