Dong-A gel pens are a fixture in my workplace. They're good, but their ink doesn't last very long.

The priciest ballpen I have is a simple Cross model given to me by my uncle. For a normal blue ink ballpoint-pen, it writes well and looks pretty good IMO.

+1 on shadow, I've had a few Parkers before and they're great.

I also bought a whole box of Panda ballpens after graduating from college, thinking I might need them for job hunting or work purposes. It's been a few years since and I've used only 10 of them so far. They still write okay.