Agreed, I know it's more effort but you will have better luck selling things individually. It's unlikely anyone will want the entire particular set of stuff you happened to get - unless it is really cheap and they plan to resell a lot of it, but believe it or not this isn't really cheap. It would also be better if you just put the info directly in a post with prices rather than making people open a document, which can be problematic. You can periodically post updates of what's sold/still available and it will be easier for people to see, otherwise they might not bother. And yes, it's best to have pictures, though I think you might need to have a certain small number of posts before you can post pics.
(Sorry diving didn't work out for you. Really your instructor should work with you to get you to where you need to be, or lay out what more needed to be done, assuming you still wanted to do it and there's no medical issue. Simply "not passed" sounds a bit unusual. It's an alien environment and almost everyone has some issues they need to work through., sometimes lots of issues. It's not supposed to be like a test in school where you just pass or fail.)
