I buy from a genuine barcode reseller - http://simplybarcodes.net/ who is into the business before I started my tshirt production business. We have never found any fault with their barcodes or their service.
Does anyone have any experience with purchasing barcodes? With so many different people selling them, how do you know yours will be usable for as long as you are in business? Any info or experience others have had would be appreciated. Thanks.