European pill bugs, the conglobating ones that roll into a sphere, and the backbone of the isopod hobby. A. vulgare is the common roly poly. A. maculatum, A. klugii and A. gestroi are the ones people actually collect.
They tolerate drier conditions than most isopods, breed steadily, eat decaying leaf litter and vegetable matter, and are close to impossible to kill. Reasonable as a display culture or as cleanup crew in a bioactive setup.
The market runs on morphs. A new color form enters expensive, gets bred out over two or three years, and settles near the floor, and this cycle has repeated often enough to be predictable. Established morphs like the zebra now sit at the bottom of the range. Whatever is currently commanding a premium will not be in three years.