So we can all put a happy end to this, you must look at it like this. Leonardo, you asked for help for a question you had. Fastlane and myself (for example) led you in the right direction from experience, so I think personally our answers hold weight over your opinions. eBay, like Fastlane mentioned, is not where publishers buy game rights.

If they agree to buy your games RIGHTS, then unless they mention otherwise you do not need to make improvements for it. However, if you want them to publish your game in it's entirety, then you will most likely be the one in charge of fixing the bugs as well as anything else they may want. Remember, they are in power here (not you) regardless of who approached whom first.

Following simple awareness steps and co-operating nicely will almost always lead to a happy ending somehow.