The AT101W was my first Alps keyboard, I think it was $5 or so at a computer recycling place. It was a good introduction to Alps switches, although I really prefer the Focus/Magitronic keyboards for actually typing on. Check around for a FK-2001, they're about the same price and have nice double-shot caps if you decide to accumulate Alps keyboards.
There are also several threads on GH about the multiple flavors of Alps switches, I've only tried the Alps Whites, Blacks, and Greens.