with domains like this one it is worth what someone is willing to pay for it - yes?
Yeah pretty much.
From my perspective their isn't any obvious commercial value, so there would be no "market" for a domain like this, ie if you put it on the AMA tomorrow I would expect that it wouldn't get more than a $100 bid at best (I'd actually expect it to pass in).
That's not to say it couldn't sell for $X,XXX to the right buyer, but the problem I foresee is that the "right buyer" (ie someone who sees some "beauty" in the domain) will probably only come along rarely, and even when they do, what they offer will be completely random. Some might throw you an offer of $250 and think that's fair or they might throw you an offer of $3000 and think they are getting a bargain, because they all see a different amount of "beauty" in the domain.
So the problem is because there is no obvious commercial value and knowing how much "beauty" your potential buyer sees is impossible to quantify it makes negotiating hard, and you could be waiting a long time between potential buyers (I suspect when it comes to potential buyers who are willing to pay $X,XXX you may be waiting forever), which means you are sitting on a liability (costs $10/year to own) that can't be liquidated quickly (ie no active market) which makes for bad business when it comes to domaining.
Just my two cents.
That said, I'm certain some domains make loads of money with this method - it's just that they have bought dozens, if not hundreds, of domains just like this so they only need a couple of those "rare" buyers to come along a month for $X,XXX and they would be making themselves a living.
So the idea "might" work on scale - but probably won't work on an individual basis.