My experience selling stuff on here the past few years is that the majority of people don’t care about bundled accessories and value them very, very low in a sale. it’s like, “ooh, that’s a nice case (or extra pads or extra tubes, etc). I’ll give you 2 bucks for it” like it’s a garage sale. the meat of the sale is the headphone. Most people either don’t want the accessories or would like them thrown in for free.
just my experience. I had grado hard carry cases and ended up practically giving them away