I'm using a harbor freight one and its great. I think Pittsburgh is their brand. Do i trust it enough to get under the car, no. Does it get under my lowered suspension, yes. Its also aluminum so its pretty light.
I bet harbor freight has some cheap (price, not construction) jack stands. There may even be a coupon in the back of a car and driver.
Harbor freight is GREAT for any non-critical tool. IE, i wouldnt trust their torque wrench for my headstuds, but i'll sure as shit use their jack and screwdrivers.
I'll post up some links in a min