I FINALLY found a Daring Plum 200GT - something I've been lusting after for oh, I don't know, six or seven years.
It's got 6,670 miles and from the photos it looks like it's in pretty good shape. It wouldn't be too hard for me to travel down to Jamaica Plain, MA with a trailer to try it out. Or not. I have a long-expired motorcycle permit and I've never ridden an actual Vespa before.
Anyway, I think the seller's asking too much ($3,300 obo) for its age but I don't know what's fair to offer. KBB's motorcycle lookup says $2750.
Attached is a photo of the lovely thing