The Toxic Cables Silver Poison costs $300 with the cheapest shipping option along with a long wait time because Toxic Cables are extremely popular. This is an awesome cable for the HE-500 and they paired extremely well together. Heaps better than other expensive aftermarket cables I've tried. My price is $200 and I have hardly used it and I keep my headphones plugged in to my amps so there is hardly any wear on the plug. Avoid the long wait and grab it now.
It's is in mint condition and has about 200 hours on it, nicely burned in if you believe in that. It looks awesome too. Oh, and for those who don't know this is a pure silver cable with gold injected into it to give it a nicer bass response. It is 6ft BTW.
PM me with any questions or offers. Taking trades for HD800 cables as well, but I'd prefer cash.