I've pretty much given up on a Vintage Kin purchase. Leaving out names and places to protect the innocent and guilty alike, a forum member agreed to inspect an Avion C-11 for me at a location some distance from Minnesota. After a positive report from the inspector, the seller and I agreed on price and terms and he was to write up a purchase agreement to formalize the deal before I drove cross-country to retrieve the unit. I haven't heard anything from the seller since, and it's been almost two weeks. No response to calls or email.
At least I didn't drive for a day and a half and then have him fail to show up.
I'm still looking but that particular C-11 was in unusually good, original condition.