This little cutie retails for about $30, and it's an aluminum body with steel nib. It's four inches long closed, and five inches long when posted. It only takes cartridges, but I bought a squeeze-style refillable cartridge for it. I've used the included one with it, so I'll wait to see how the squeeze one does.
What's surprising is that, for the price, it's a really nice nib - very smooth, and starts flowing right away. A really nice pen overall.