thought I'd mention this inexpensive rack I bought a while back and have on my mtn bike ($20 Can.)
Not in the same price range at all, and is surely limited in what weight you put on it, but for lightly loading, I figure it will do the job for what I want to do. Here's the link to the topic I put up after I stuck it on a while ago. I've been riding with it on the bike lately, but havent put bags on it yet (it uses thicker alu than traditional racks, so I have to modify my old front panniers-enlarge the top mounts that are simple curved metal bits, I have to force them apart a bit to fit over the larger diameter tubes of this rack-and just havent done it yet.)

http://www.bikeforums.net/showthread...ack?highlight=

in any case, a cheap alternative to consider.