I hope you can sell them. The ZYN cymbals are quite inexpensive on Ebay in the UK. Super Zyn are the better type, and they're usually more expensive. There are other types of ZYN cymbals. There's the 5 star Super Zyn, which are B20 bronze alloy, like the Super Zyns, and there are Zyn cymbals stamped STANDARD QUALITY ZYN, which are a B12-ish alloy, and they're also usually more expensive that the plain ol Zyn cymbals, which are a nickel silver alloy.

People asking over 200 dollars for a Zyn ride cymbal are probably not to well informed on the prices. The best way to figure out a price would be to check the sold listings on Ebay. People can ask whatever they want, but that doesn't mean that that's what they're worth. Check out what they've typically sold for in completed Ebay auctions for a better idea of what they're worth.