Elrick's a hoarder. There's a show about people like you and it's very depressing. They AGONIZE over throwing out shit like: plastic bag full of other plastic bags - plastic bag full of old nails - leaky batteries. It's usually super gross to watch.
I don't know - maybe you need to make thematic-lots and sell via ebay/bgg or whatever. Instead of trying to list 300 items, make a few big lumps and eat whatever loss you take. Don't just throw it away, gotta be somewhere out there who'd buy it.
Glad you like BSG J-uryathon, it's fantastic. Try True Blood next, chicks always like vampires. I love that goofy-ass show.