Yeah, I know the asking price is on the high side- I might see about offering something a bit lower. In my area of the country, however, vintage bikes are insanely priced and don't come along all that often. Hence why I'm looking at Craigslist in places I'll be traveling sometime in the relatively near future. They do seem very well maintained, having been continuously ridden by the owner since the original purchase, with maintenance at the same shop.
I can't quite comfortably straddle the 61 cm- to be flat, it needs to be offset, or I'm on my toes if it's straight. Not a problem once I'm riding, but I'd like something a bit smaller.
I'm 5'10" with a 30/31" inseam as well.
So it seems like the 18" would be on the small side of comfort, and the 21" possibly on the long side, but a good bit smaller than what I have now.
From what I can tell comparing the geometry to my Voyageur, they look quite similar- but I know a few degrees here or there can make quite a difference.