You are wrong. Though I'm not sure how common it is. You can get a free Amazon seller account and see for yourself. Many common items that you might want to sel

You are wrong. Though I'm not sure how common it is. You can get a free Amazon seller account and see for yourself. Many common items that you might want to sell have the option to commingle inventory. The benefit to the seller is that you can print out multiple copies of a single barcode and stick it on all of your items and just send them in. Whereas non-commingled will need a unique barcode on each item.