holy frijoles, thass 'spensive!
they go for about 4 bucks on taobao! (the chinese ebay)

got one on my mountainbike that i use for touring. panniers on the rear, with front
rack to take a few pounds off the back wheel. use it to carry the u-lock or heavy
cable lock. when touring, up to 4 liters of water.

no problems yet. had it almost 3 years, maybe 25k km's of touring, some on
fairly rough roads.

don't see how you could mount panniers. rails are too short, and the
hook thingie is too far to the rear. could always mount a basket, or
get a velcro-attachy beer cooler bag.