I just bought a home monitor because I developed gestational hypertension towards the end of my pregnancy.
Even though I'm comfortable using the manual cuff-and-stethascope set-up on other people, I opted to get an battery-operated digital version for home use, since it's easier to use by yourself.
I got a product by LifeSource: model UA-702. It has a cuff that you inflate manually with a bulb, and it gives you a digital readout of bp and pulse. It cost ~$60 and seems to work just fine. There are other fancier (and more $$) models that self-inflate, or have memory to store previous readings and so forth, but I figured I didn't need that stuff.