Originally Posted by skidder

Wald make a basket that clips onto the handlebars of a bicycle. The only difference I can see in mounting is the Wald doesn't have the spacer/stem thingy that keeps it away from the headtube to keep it from getting scratched (i fixed that on mine). Easy to take off and put on another bicycle.

133 Quick-Release Basket – Wald Sports


The price show here is the MSRP but you can find them for <$30. I can't see a weight limit for it, but I've had 15lbs in mine. They also make a larger size model, and different bolt on baskets and racks that wouldn't take long to swap to a bicycle with braze-ons.