Re-seller's permit or manufacturer's approval is usually required when selling high end brands. You can however, legally re-sell brands sourced from liquidators. These are suppliers that sell items at clearance/liquidations for reasons such as end of season, or overstocks. In this case, you need to let the liquidator know that you intend to re-sell their products so they can provide you with certain permits and certificates.
When selling branded goods on eBay, you will have to use your own photos as a simple copy/paste of product images/descriptions from the manufacturer can be grounds of infringement. A great way to take clean photos is to use a photo tent for a professional look.
Hope this clarifies.