PS Audio XStream biwire, what are they worth?


I hope this is the right place, I've got a question about the value of some cables that came with a set of used speakers I picked up. They are the XStream biwire, 4.0m, pair of them. The guy said he spent $1700 new, which looks about right. I don't need massive cables and would like to know if they are worth selling or not.

If they are worth under $500, it probably isn't worth it for me to sell them.

Thanks guys.
i_hate_poker
I love poker, but I hate high-priced cables. They never justify their performance per price and only designed to 'trim' your wallet size. There's never been anyany successfull blind A/B test vs. zip cord with anyone so selling them and getting cheaper wire will save you money and won't affect performance.
Thanks for the responses and info. Too bad they have depreciated so much. I'm using them in my system now but was just going to use 10GA Bluejeans cables or something if I could end up with an extra $400+ in my pocket as I don't think I could tell much of a difference if any.
Last night I heard a Nordost $6K Valhalla 2 power cord improve a ARC-Maggie 3.7 system by an order of magnitude.
If I had 6k to spare I'd buy a pair, but sad to say, I don't.
Schubert, no worries, you can get it next year used for $600 if you have'em spare(I don't even have that much for it and stuck with stock:)).