8. Give all the information
Two seconds spent linking to the manufacturers page on your item, or giving the full product number so the prospective buyer can do their own research is a really good way of helping your item sell.
Aunty Maureen got you what she thought was the latest thing in computing, sadly that USB hub she got is a bit passé for your discerning geeky tastes. So what do you do with it?
You can relegate it to the dongle basket that lives inside your wardrobe, or you could sell it and make a bit of money. Time to brush up on your eBay selling skills.