That Moulton clearly demonstrates the problem with upgrades - I have seen it with cars too - upgrades do not confer extra value to a basic sale item. Such as in this bike, the extra value added due to extensive upgrades seems to count for nought in the opinions expressed here. That seller would be far better off parting it out, putting on the most basic crap and selling that as a Moulton APB, and then selling the wheels, saddle, drivetrain etc off separately.
Parting out almost always results in more cash.