While Loket.co is an actual region in the Czech Republic, you may find it difficult to sell since it is a .co. Having that said, it can sell between high $XXX - low $X,XXX. CyberCrime.co is a pretty good domain name, but again, a .co is not easily sold. I would hang onto it for a few years to let the value increase. BankPlayer.com is a rather odd combination...so I don't know what to tell you. If you can find a company or board game corporation that may be interested, then it can sell for any amount, really. Cilukbah.com is a PR2 domain, so it can probably sell mid $XXX. However, the branded name is a "curse" in sense that it will probably be mis-spelled (Cilukba). Thus, redirecting traffic elsewhere. One more thing...take all of this with a grain of salt. Sometimes, you will end up finding an interested buyer for a domain name you thought would never sell. Always be prepared for the unexpected
Cheers,
Yev