Mostly worthless. A few years ago I had far more then that and simply threw it away. The only thing of any value woudl be teh cat5 patch cables. And even those are not very much. The power cables come with everything, Those db25 plugs are worthless, I threw out about 100 of them. Perhaps contact a computer store and see if they will take them. I would put total value at $20 if you could even get that. Computer stores buy cables very cheep, and mark them up a lot.
Gonna have to agree with Wren on this one (I know, it'* sad :P ) That networking cable isn't even CAT 5e, and, yes, it does make a difference. But hey, you've got nothing to lose listing it, from what I hear, listing fees are now lower on eBay