The classified are for selling things.
They do not require third party "clarification", or uninterested parties telling a guy he's out of his mind, or public fraud alert. If a listing looks suspicious, we can always contact @Theron and ask that it be taken down.
A thing is worth what a buyer and seller agree that it is worth. 3rd (and 4th, and 5th) parties just muddy the waters. We can't sell on ebay, and we're the largest 356 replica site in the world.
I've always wondered why we feel the need to attempt to regulate commerce between two other parties. We're not the government.
The $10 thing was to shut off the "become a supporting member before you try to sell stuff" thing, because $50/yr (in perpetuity) to sell something is just stupid. A one-time, $10 donation for non-members is just the price of admission.