Web site: AF200FG Flash
Key Features: P-TTL or basic full-power manual mode.
Reasons to Buy: Cheapest Pentax-branded model.
Notable Drawbacks: No bounce ability. No zoom. No advanced features. Lacking many basic features too.
This is Pentax's entry-level model, bundled with the K2000 camera kit in the US. It provides about three times the power of the built-in flash, but doesn't have many other advantages — not even a focus-assist light. And while it is compact and lightweight overall, the flash power per gram (or ounce) is relatively poor. Since the K2000 bundle is the most-common way to find that camera in the US, if you're interested in adding this flash to an existing system, you may be best served by finding someone who bought that kit but wants to upgrade to a flash with more features.
More about the Pentax AF200FG can be found on these pages:
Including an Amazon link on this page is the easiest way to display the current prices, without having to keep track of it manually or write a more-complicated tracking script. And as a bonus, there's a picture of the flash. Obviously, the ad is also an affiliate link. As with all advertising on this site, I hope it's not too obnoxious.