EAN Number is European Article Number which is use for selling your products at any major marketplce or High Street Shops. You must need an EAN number for selling at Amazon eBay Wallmart Google Shopping and all major marketplaces. The Question is where you can get them and cheapest for your online selling.
Main website to Buy EAN Number is GS1 which is quite Expensive and recommended for only those who is selling in High street and have Registered Brand with IPO other wise cheapest way i find to buy EAN number is CodesForAmazon.Com – EAN UPC ISBN BARCODES
Hope this will help you to grow your business online and sell products at hundreds of marketplaces in cheap price also sustainable for your brand.
I suggest to have these Codes and list your products to get even more sales for your products. as without EAN looks your item is not registered and identical etc so cannot sell a lot for each item.