So you are moving and running short of cartons, your friends have given all they have, other movers have beat you to the free cartons on CraigsList, and you don't want to pay the prices for new cartons at the moving and storage companies.
Then check out this website: http://www.cartonserviceonline.com/
They have both new and used cartons at reasonable prices. I prefer their 1.5 cubic yard carton which holds a good bit, but can still be picked up by one person. I won't quote prices here, but check out the website or give them a call and I think you will be pleasantly surpised when you compare to the prices that some of the other companies are asking.