Originally Posted by
Onions
I've been using a $17 rack I picked up online for over a year, and it's good for groceries, panniers, milk crates, whatever.
http://www.amazon.com/gp/product/B0014UWMHE/
Get something cheapish and see if you like using a rack. If you do, use the cheap thing till it dies or the flaws annoy you enough to make you by a new one~
This. I have a cheap rack for under $20 because I did not want to pay $100 for a really nice one. The cheap ones may need a little modifying to fit just right. I had to attach my rack with p-clips for lack of mounting holes on the bike.