I feel terribly guilty about making you type all that now. I got your drift perfectly the first time. I think you're not getting mine.
You've always been able to sell anything you want, at any price you like, do it however you wish, and put the money into the YDC pot and pimp along etc - the rules just say whether or not your items are included in the competition. For example, XXX doesn't have time to worry about stopping and starting things, so he lists YDC items all the time with no number associated, and his stuff isn't included in the competition. So you can *already* choose to start at 20 quid, and if the existing rules are enforced you just won't be included in the competition. Which, as I understand it, is what you wish to achieve.
So to reiterate... the rules are there, they just aren't enforced -- mostly out of good nature I think. Maybe they should be, good nature notwithstanding.