Keyword is worth 0 because of no exact monthly searches. It sounds good as a slogan but can't be used as brand name so with all this in mind it is worth only registration fee. It might sound good but why-the-fuck-my-domain-name-has-no-value.com sounds good too but it still has no value.
Sometimes people buy crappy domains, so if you can't get a refund, why not try to sell it. If you're lucky, a well-meaning, but naive, end user will buy it for $30, but I doubt it. I mean, it doesn't really have commercial value - get your free website... if it was cheap then maybe. Please don't take that as a sign to register the cheap version though, as it still has a low chance of selling.
Yes, that's very true. That's why I want to sell it. Happy to accept anything for it. Not even expecting $10.
At least you're being realistic! It's amazing what someone want at times and hold onto for years. Good luck with with the sale, mate.