Many brands restrict the sale of their items online because they know some online sellers are here for a quick buck . its sad but some people will buy products for $5.00 start off by listing it at $7 or $8 dollars. meanwhile the other sellers who either bought it for the same price or higher will get scared or have their re-pricers set to undercut by 0.50 cents under what the cheapest other seller is selling for .
Everyone is competing and it becomes a race to the bottom.
When selling branded products, make are you deal with suppliers that protects its sellers and the brands they work with.