Hi, sorry you have been led to belive by people here that there are 'ways round' the rules here, but there aren't.
Regardless of what people may say, the rule here, is as is describe above, and in the 0 point warning you got. There is a blanket ban on any non supporting member posting a 'whats it worth' post on the forum due to frequent attempts to get round paying for an advert.
There is no way of rephrasing the request to get past the rules because it is still the same thing.
As mentioned, you can see what others have gone for, or just sell it and see what you get offered - I find if you ask someone what something is worth, that doesn't always have a bearing on what you will get for it at the moment, which appears quite a lot lower than peoples belief in somethings worth.