I've owned and sold most of my holy grail mopeds. Many times the hype out shined reality.
My current holy grail is my Motron GTO
I've sold every Derbi I've ever owned about as quickly as I bought them.
Peugeot 105R was probably the rarest of them all. Luckily it found a perfect home.
I think the thrill is in the hunt really. So far the only bike I can't quit and will never ever sell is a busted Malaguti Fifty.