Try selling things in lots. Like put all those electronics and things up in one listing and say something like "$50 for all" (or something slightly less than you were trying to sell them for individually). Less transactions, everything gets sold (hopefully), and the buyer might feel like they're getting a "deal" by getting all that stuff for only $X.
That said, I haven't had a ton of luck either. For instance, I have a floor length angora peacoat that I've been trying to sell lately but no matter how low I go, no takers. It's a really nice coat, but not a "brand name", so I can't get any views.
BTW, shipping on ebay you can charge a flat-rate or real rate (like USPS, UPS, FedEx, based on weight or size, which it calculates for you) depending on what you prefer. Offering free shipping usually gets more views, but then you have to factor that into the price.