I like you, Claus. I'm sure I like you more than the average poster round these parts. But it's such a shame when an obviously intelligent, vaguely eloquent and often interesting person has to resort to such weird obfuscation and borderline silliness just to avoid having a sensible discussion of their views.
Claus. Honestly. You haven't answered questions or given explanations. Else we wouldn't be still asking them. To make your case, you urgently need to post your definition of selling.
I've also provided you with some art-works that, in my opinion, don't sell anything at all. I'd like you to explain how you would claim that these pieces sell, and what they are selling. It's the same question I'd ask any of my students.
Take Breakdown, for example. During this performance, Mark Landy pulped all of his possessions, including some art-works he owned. As the work resulted in total absence, it cannot be bought or sold. As the work was about taking, destruction and removal, it seems that saying it was "selling" something is extremely problematic, given that the word sell usually entails precisely the opposite of these terms.
You might like to argue that the work "sold" Landy as an artist - but if this is a sale, what did he get in return? No doubt the material and personal value of all of his possessions, including several very, very valuable paintings, was greater than he might hope to receive for future sales of more traditional pieces (if, indeed, he does choose to produce material works). Is this a sale in any real sense? Was the work itself "selling" Landy (who's buying?) or it it contribute to his status as an artist in a way that is rather different to that which might normally be understood by the term "sell"? I think terming this work as "selling" something is something that would require some very rigorous defence. Such a defence might be possible, you'd just have to define "sell" convincingly.
You might well have a case - as I said, if you are arguing that art is always already commodified (and is therefore selling itself) in some way, then that's an argument worth having. I don't think it quite holds up, but it would be a more tenable position (and one more conducive to interesting discussion) than the one you're currently taking.
So, if you are interested in honest debate (and I believe that at some level you actually are), please explain what you mean by "sell", preferably in reference to those pieces I've already asked you about. That'd help me understand where you're coming from, and what you're trying to say.